Update (7/13/2023):I purchased an alternative that seemed close in 'stature' to this mouse because I wanted Bluetooth connectivity, as mentioned earlier for my notebook(s) in case I travel. In general I wanted to just use one mouse. The idea is I use it on my PC (using usb dongle) and then BT elsewhere. Anyway, I got a Nulea, which is nice but it still doesn't hold a flame to this mouse. The back of the Nulea is almost slippery compared to the HUGE and is not as wide, thus, it just doesn't feel as comfortable. My hand sort of just wants to slide off the surface, which makes the material they popped on the HUGE pretty thoughtful.Update (5/10/2023):This has remained my absolute favorite mouse. Wear and tear is so very low even though I use it daily. All I can hope for now is that they make an almost identical updated version, but wireless AND Bluetooth and maybe even a plug-in for a wire so I can buy one to use with my notebook(s), basically a Deft Pro version of this mouse. Again, I personally love and highly recommend this device. This is THE PERFECT finger trackball mouse for bigger hands (and even perhaps, for any hands).Initial Review:I'm one of the unfortunate few index trackball addicts. I cannot use a regular mouse for very long and I certainly can't use a regular mouse for any sort of gaming. That being said, what started me on this terrible journey was a Logitech Marble Trackman - that trusty trackball that's still around. Shortly after succumbing to the trackball, I moved on from that to a Logitech Cordless Trackman Optical, this is where things went wrong. It was for me, the perfect device. A trackball mouse that just seemed to fit perfectly in my right hand. It had a few extra buttons that came in handy for games. My first lasted 2 years and the second lasted roughly the same except just before this one died Logitech decided to discontinue the product - oh, %^#t.I went through phases of tech grief, which are sort of similar to regular grief. I denied that the product was discontinued and convinced myself that the product was cycling, which is when they sometimes discontinue the product and re-release it in a few months with different colors or a different name. This did not happen. I then became quite angry, which I know is quite silly but hey, it happened - because I felt betrayed by the company. How can you, as a company, release 1001 different models of the same mouse but just 1 very, very, very basic model to cater to index finger trackball users? I then entered the bargaining phase, which is where the tech part of this comes in. I took to their forum, Twitter, Facebook, anywhere I figured I could nudge the company into getting the idea that we (index finger mouse users) exist, enough so to at least bring another model to market. I came pretty close to publicly begging. After months and not a peep from the company, I became sad - depressed isn't the word I'd use, again, this is not real grief, just tech grief. I felt sad because I felt really uncomfortable and out of place using a regular mouse and nothing else was working for me. I tried several from various companies like Kensington and the thumb trackball from Logitech (which I cannot use, whatsoever). Finally came acceptance. A slap in the face recently is that the company introduced a new thumb trackball, as if their M570 weren't enough, they released the sleek MX Ergo Plus - Ouch. I bought a new Logitech Trackball, the basic one, you know and that was that for some time.Enter Elecom, a foreign company that doesn't seem to be on the radar yet. One day I decided to do another search for trackball mice and I discovered the Deft or EX-G series, whatever they call it. I bought it and it turned out to be a great cordless Trackball, however, the ball never quite felt right and the shape was just off enough to make it, not quite a gamer mouse for me, though I could use it for everyday PCing, etc.Finally, finally, I get what I want/need. They've released a larger version that is, perfect, for what it's worth. I can't really explain how great it feels so I'll say this. I wrote those previous anecdotes for a reason, so you could/can identify with me. If you've ever used that darn Logitech Cordless Optical Trackman OR the Microsoft Trackball Explorer, which is very similar in feel, then this is it, folks, this is the trackball for you.At first, it feels a bit large, too big in fact - but give it a few, just like the Trackball addiction sneaking up on us, the device eventually becomes just right. I don't quite remember how my hand was when I used the previous devices but I think the most jarring difference is that you won't have to contort your ring finger to right-click, as the buttons lay right under your hand in a naturally open position. The top of the device is large and there's soft padding so you literally just lay your hand down on top of it, it's very comfortable. There are some extra buttons that I haven't figured out how to use since I haven't read the manual (3 function buttons) but you get the staple of an advanced Trackball otherwise, you get a clickable scroll wheel in addition to 2 clickable buttons (forward/backward for browsers) just above it. All of these tend to work universally and are easily bindable in games. The left button is under the scroll wheel in a really great position, IMHO, as my thumb sits right there. The 3rd function button lies beside the right clicker. There's a switch on the device that seems to increase trackball speed manually vs. through software.So far, it's a fantastic device. I got the corded version and am seriously considering buying 2 or 3 more and just putting them away, just in case. I'm giving it some time to see what if anything happens to the device after months of use.Thank you Elecom and Thank you seller and Amazon!Just came back to say that after many months, the mouse still works perfectly. I own 2 now. 1 for my main system and another for my work system. I'm going to buy 2 more as I mentioned before to put away, just in case Elecom decides to call it quits on production. I also have my eye on the Bluetooth model that I will likely use with my mobile devices - I'll see. The HUGE is so great, I'm not sure I want to change the formula.

**UPDATE**I originally bought this in 2018. I just ordered another. After nearly 5 years it is slowly dying lol. First a few weeks ago the up tilt switch on the scroll wheel completely stopped working. Now the down tilt even though I unbound it is causing movement issues, and Elecom software no longer emits(for lack of a better word) the correct key binds for other buttons(only non standard mouse buttons). I still have use of the 2 buttons above the scroll wheel, but they are only recognized as mouse button, not a key. Far right pinky button, Fn1, Fn2 no longer are recognized. This is still hands down the best trackball you can buy, since Microsoft trackball explorer from eons ago. This mouse is so easy to use for anything, and unlike the a smaller version of this, that I first bought, just killed my little finger as the right mouse button is angled so the edge is what your pushing, not on a flat surface. This is the perfect size, easy to use index and middle finger on the ball at the same time. Comfortable wrist pad which has held up perfectly as it is soft rubber. And of course the reason so many of us switch to these types of mouse, NO Carpel Tunnel pain or arm fatigue from moving a stupid regular mouse. Good Job Elecom.I love it's size it's close to the MS trackball explorer. Love the wrist rest. The downside is and I had to figure this out on my own. If you plan to use this for gaming you will only get to use 5 of the 8 buttons that it has. And to do that you have to NOT download the elecom assistant. If you use the driver and elecom assistant your games will not recognize buttons 4 and 5 and your now down to 3. Once I deleted the the elecom driver and assistant, games would now recognize buttons 4 and 5. The function keys are not mouse buttons and thus not recognized by any game. Least I haven't figured out a workaround yet. As for the mouse, if you have carpal tunnel or don't want it, a trackball mouse is the way to go. I have been using them for years and once you get used to them the non movement of the mouse just 2 fingers will not cause that carpal tunnel to appear even with long play times.

I have been using my good old MTE for years. I've finally come to another trackball that is as good as it. There are differences in the approach: e.g. the right click is not on the thumb side, the body is more flat (your hand is less tilted). The thing I like the less is the body being more flat than on the MTE but the soft material compensates a lot. Besides that, changing the bearings is a must do. I tried it with stock bearings AND ceramic bearings and yeah, no question. So ELECOM, if almost all of the users change the bearings, maybe they should be ceramic by default ?

Premetto che è il primo trackball che uso. Ho preso questo perchè ero sicuro che i giapponesi curassero l'ergonomia alla perfezione e ne è ho avuto la conferma definitiva.Ottima la precisione della "sfera" che guida il puntatore, nel mio caso non ho fatto la modifica che viene proposta su web per aumentare la scorrevolezza della sfera stessa, è andata bene così com'è in quanto è proprio la leggera resistenza al movimento che lo rende più preciso.L'ho utiizzato sia con Windows 10 che con Fedora 39 e 40 con KDE e posso dire che è più reattivo con Fedora (entrambe le versioni) mentre con Windows 10, nonostante abbia installato i driver e l'app Elecom "Mouse Assistant", spesso il movimento del puntatore sembra "rigido", mi da la sensazione di avere una resistenza al movimento, mentre su Fedora è molto più fluido.L'unica leggera scomodità, almeno per i mie gusti, sono i tasti posti alla destra della sfera che secondo me dovevano essere leggermente più in alto perchè risulta un pò scomoda la pressione degli stessi a causa dell'altezza della sfera rossa.E' altamente regolabile sia direttamente sul dispositivo, dove si può scegliere la velocità di scorrimento tramite selettore (con modifca immediata) sia con la personalizzazione via software dei tasti presenti (8 + la rotella laterale).Nel complesso sono soddisfattissimo e lo consiglio vivamente.Avevo letto in qualche recensioni che una volta provato un trackball difficilmente ci si rinuncia e posso confermare che è così, è molto meglio del mouse classico.

Simplemente genial, se pueden configurar los botones son problemas, es grande pero la almohadilla que tiene hace que sea cómodo en las largas jornadas de trabajo, el interruptor de precisión ayuda a moverme rápido entre los monitores y detallar lo más pequeño. Buenos materiales, se siente de buena calidad. Al principio el cambio de usar trackball en el pulgar al índice me descontroló un poco, pero el menos de un par de horas ya estás como pez en el agua de nuevo. Muy recomendado

Harto de Logit... y su obsolescencia programa a precio de oro, me decidí por esta marca por las valoraciones que tenía, y no me he equivocado. Cierto es que lo compré nada más salir y los drivers estaban algo verdes: sólo se podía modificar la configuración en idioma asiático. Pero me atendieron perfectamente y acabaron resolviendo el problema en un mes con una nueva versión (entretanto pude configurar las cosas memorizando la posición de las opciones en castellano y cambiándolas en japonés). Ahora va todo bien.No acabo de ver utilidad a los gestos, así que poco puedo comentar (utilizo atajos de teclado).Me ha encantado, sobre todo considerando que siempre tengo la mesa hecha un desastre y una pantalla 4K de 43". Con un ratón se tiene que mover mucho la mano e ir dando saltitos para reposicionarlo, o utilizar una alfombrilla gaming. El manejo es preciso, y se puede desplazar el cursor de un lado a otro de la pantalla moviendo rápido la bola (lanzándola y parándola, más bien), muy útil en pantallas grandes o múltiples.Tiene un montón de botones, todos configurables (10 clics disponibles), incluso personalizable según programas. La rueda es normal, sin sobresalir en calidad. La bola funciona muy suave, más si se van limpiando de vez en cuando los tres puntos de apoyo (quitar la bola, que va a presión, y limpiar los puntos rojos del compartimento donde se aloja). Su gran tamaño hace que se maneje con precisión (imprescindible en CAD), con uno, dos o tres dedos. No he podido probar trackballs de pulgar o más pequeños, pero dudo que sea tan preciso como este.Para manos relativamente grandes es muy ergonómico, ya que se puede apoyar desde la parte inferior de la palma (casi la muñeca) sobre el dorso acolchado. Recomiendo asignar a algún botón el doble clic, es más ágil y evita movimientos sobre la bola al hacer la doble pulsación. Además, agiliza la selección de palabras y párrafos. Otra opción es soltar la bola al hacer doble clic, pero es más lento y queda torpe.Pero tampoco pensemos que es todo maravillos: necesita un tiempo de aprendizaje, resulta lioso para el que no lo ha manejado nunca, y no se alcanza mayor precisión ni velocidad que con un ratón, al menos no lo he notado. Hasta que no asignas doble clic a un botón, es muy fácil mover carpetas o archivos sin darse cuenta, ya que tendemos a mover la mano al hacer clic. En mi caso he ganado comodidad porque no necesita espacio físico para grandes desplazamientos del puntero. Además, me permite tener la tecla intro del teclado siempre justo al lado del pulgar derecho lo cual puede ser muy útil. Tampoco puedo decir si mejora problemas con dolores del tipo túnel carpiano, no los tenía.

2年ほどで左クリックにチャタリング発生（同一商品）。接点復活剤やマウスチャタリングキャンセラを使ってみたが効果なしなので買い換えた。マウスアシスタントで自分好みに変更して使い勝手バッチリ！！