Have tried a few trackballs as I'm looking to use my computer for longer periods these days. Kensington has some of the smoothest movement I have found. When properly maintained, they can be so accurate with such little movement. The scroll wheel is another great Kensington feature. Makes a lot of sense. This mouse is unique as it's fusing the ergonomic developments in traditional mice and the innovations Kensington has made in the trackball space. The result is fantastic. A trackball that is very comfortable for long sessions.I have it plugged into a switch and use it on my work PC (Windows), home PC (GNU/Linux), and a PS4. Occasionally have connection issues in this setup (which I solve by picking up and shaking the mouse a bit). Think the mouse goes to sleep as the switch is transmit only? I see others complaining about similar issues. It doesn't happen too much, but can be irritating. Wish there was a wired version in this configuration. I can't really game so well with some of the other trackballs. This one is great for all kinds of games from RTS to FPS.

Kensington has been one of my favorite brands for over twenty years. Great company. They have great customer service, and great products.I really wanted to like the Orbit Fusion, but the horizontal placement of the left buttons makes it very difficult to left-click without moving the trackball. Instead pressing down, you have to squeeze your hand a little to click the button. Whether you're clicking on an underlined web-link or clicking in a video game, it's super-easy to miss-click. When squeezing your hand to click, the trackball usually rolls to the right a little, unless you're super-careful.The Kensington Works software is easy to load, and works fine. It's very simple and no-nonsense, which I like.The ergonomics are great. I like the way it fells in my hand. It's a more natural position.The scroll-ring is one of my favorite features --it's super-functional. This one works the same, but it's not as smooth as the scroll ring on my other two Kensington trackballs...Right-click is fine, as that is a vertical button --my only gripe is that it's only big enough for one finger (your ring finger).On a lower-resolution screen, this is probably less of a problem, as the trackball acceleration will be lower, and the miss-click to the right will be less. BUT --high resolution screens are what make a trackball great. Need to move the pointer to the other side of a 4k screen? Roll that trackball right on over! Zoom! No picking up that mouse to re-center it on the mouse pad. It's great! Nothing like a trackball...A couple comparisons: I've used the Expert Wireless Trackball and the regular USB Orbit (wires matter way less with a trackball). Both the Expert and the Orbit are great --but the buttons are pressed vertically, so they cause very little accidental motion from your other fingers on the trackball. I can track the pointer over very accurately, and click on the right word in a paragraph without changing the position of the pointer at all. Even when gaming, when you're really rolling and clicking together, these two are both very accurate, and I go back and forth over which I like better.Kensington's products: great!This particular design: it's not for me...Update 24 Dec 21I've been using this with my laptop while travelling. I've grown to like it more for everyday emails and web-browsing. Still not my cup of tea for gaming, but I definitely prefer this to a regular mouse.

I have carpeltunnel and It is very comfortable in my hand. I like that i don't have to move the entire mouse very easy to use. There are several buttons that can be reprogramed to fit your needs. The scrolling speed is adjustable as well. The mouse is a little on the expensive side but well worth it.It is Bluetooth or USB compatible. I like that i have options to connect as my computer only had two ports

A little over a year ago I tried out a number of Elecom trackball mouses and determined that no matter what the ergonomics of each were, the problem was the ball motion was not smooth. Kensington has been in the trackball business for a long time and they definitely have this part down. The ball moves perfectly and as smooth as any Logitech trackball I've tried.The reason for trying the Orbit Fusion was I wanted the ability to switch between a thumb operated trackball to finger operated and I wanted better scroll functionality that my old Marble Mouse offered.There are two reasons for the thumb to finger switch. I find that precision movements, highlighting and the like are easier with a finger operated trackball. I also like being lazy and sometimes I will rest my arm on my chair armrest with my fingers just dangling over the trackball and mouse around that way. You can't really do that with a thumb operated trackball. However, I like the thumb operated for faster movements and I prefer it for directional movement in gaming. I'm weird like that.The scroll function was another selling point on the Kensington. They've been producing the scroll ring for a long time and I've never tried it until now. I have to say, I really do like the functionality it offers, but there are some drawbacks too.Let's start with the pros. It's a nice smooth movement. Again, the dangling fingers thing - I can lazily scroll through long articles with this ring and there's no sound or detent, so it just moves smoothly. I also like that there is so much real estate to scroll with. I can put my fingers to the bottom, the top, the left, the right, etc. I can put a finger on and just circle the ball for a long continuous scroll. I definitely dig this functionality.Now the cons. The actual rotation could feel a bit smoother. I feel like something like this should be on a set of bearings, not just plastic. In fact, make it metal, or give it a touch of weight, put in ultra smooth bearings and allow for momentum scrolling. That would be awesome. The other con is it is easy to hit. I accidentally scroll all the time with this mouse and it has been getting annoying. Lastly, it's just a little big. I feel like there's way less trackball access and that limits my use of the trackball. Compare to the Marble Mouse where nearly 3/4 of the ball is exposed and the Orbit has about half, it's a big difference. Lastly, the scroll doesn't always pick up. I've read the same comment in other reviews. Where a normal clicky scroll wheel almost always scrolls if the mouse focus is in a scrollable window, the ring doesn't. Sometimes I have to fiddle with it to get it to scroll, click out of the window and then back. So reliability is a factor. Oh, and I forgot that I can't find a good way to make the ring scroll side to side.There are lots of buttons on this mouse, which is nice for someone who wants to customize. You can even customize on a per app basis. It is a decent weight, but I would not have minded just a few ounces more. It does a decent job sticking to the desktop and not moving as well, something I couldn't say about the Logi MX Ergo.However, my biggest issue with the mouse is the ergonomics. One thing every Logitech mouse I've ever used has is buttons that are super responsive and easy to use. The reason I am now using my Marble Mouse and not the Orbit is because the left and right click are just so easy to get to and operate. The Orbit Fusion I find to be both difficult to get to the left and right clicks and that they are stiff. What this means to me is that extended use is going to result in my thumb and ring fingers hurting and eventually spasming. So that's the ultimate deal breaker for me. Add that only half the ball is exposed and the ring is just too easy to hit and I find I'm struggling to use this mouse rather than enjoying its features.With these drawbacks in mind, I'll still consider other Kensington mouses as they are clearly well built, have a long history of making trackballs, and a strong following among trackball fanatics. Usually my biggest deal breaker is a trackball that sticks, but that is something Kensington clearly doesn't have a problem with and so there may be other trackball designs that will fit my ergonomic issues. Nice effort, Kensington, but not for me.

Lo compré para reemplazar un Logitech y me parece excelente. Ya configurado con la aplicacion quedó de lujo

Work without pain and healthy hand, if there is a left-hand option it will be great, right now I'm using it with an Elecom on the left side so I can switch and give a break to my right hand.

Super jakość i uzytecznosc

Material muito bom, e muito prático para trackball. Varios botoes programaveis. E as pilhas duram bastante tempo. Eu uso para edição de video e imagem e é muito prática. Já tive várias e esta é a que mais gosto.Recomendo

Een goede wireless Trackball als vervanging voor Logitech !