Logitech Ergo M575S Wireless Trackball Mouse, Wireless Ergonomic Mouse with Bluetooth and Encrypted Dongle, Comfortable Thumb Control, Precise and Smooth Tracking, for PC/Mac - Graphite Blue BallCarbon Neutral Certified by SCS Global Services

My last Logitech roller ball mouse was five years old and it was really failing fast!I thought I would take a chance on the latest model and wow I am so pleased I did!Both the ball action and click response is far better than I ever experienced with the old oneMakes using my computer so much more functional and even enjoyable!Great product!

I can't use a mouse any more and these are the best trackballs IMHO. Just watch out. If you are expecting to use with with other Logitech products with a "unifying" receiver, DONT buy this one. It doesn't work with the unifying receivers.

I really love this trackball mouse. It’s super precise, fits perfectly in my hand, and the extra features are a bonus. I especially like the dual connectivity — I can switch between Bluetooth and the included dongle without any issues. It’s durable, handles business, and gets the job done every time. Honestly, I have nothing bad to say about it. If you want comfort and control, this is it.

I got this to replace another Logitech trackball, and when I got it out of the box I was somewhat surprised to see that the cardboard liner was printed with Pakistani regulatory info. Not really sure why that was the case, might have been originally intended for sale there, but ended up in a US warehouse?Anyways, I'm still getting used to this one, they changed the left/right buttons so instead of a solid click, you get a much quieter and softer one. Doesn't really seem to make a difference for input but for gaming it's nice to have that feedback when you press LMB.

This is my favorite mouse-like device. My family has at least 4 of the prior version. The one I was using was probably 8 years old and it started to double click even when I didn't double click. For example, when I clicked a link, it opened two tabs of the same page. But I love the ergonomics and function of the track ball. I tried to swap for my daughters but hers got something sticky on/in it (she was probably 15yo when she got it) and the right click stuck a bit. I decided to just get a new one. The new one is just as good as the prior version except it supports blue-tooth so you don't need the USB key anymore. It's smooth and clicks perfectly. Highly recommend.

I bought this to replace my old Logitech trackball mouse and this one is even better! Everything about it feels high quality, I’ve been using it for several weeks and so far it works great!

Absolutely cannot live without this. I love the feel, and it's the most natural way for our wrist. No more carpotunel related discomforts. The blue sphere option is divine.

I like this style because it takes up little room on desk. Once you get used to it it is easy to use. The ball pops out to clean it and the sensors, which you need to do every week or so.