I have been using a usb wired versions of this trackball for a number of years. I bought this as a replacement and there are some issues. After about an hour the mouse motion becomes jittery with a short delay.

A must-have for people who have difficulty in finding the space for a normal mouse. Extremely easy to set up and use. Works just as well as a mouse.

I have been using this Trackball for years. I have one for my laptop, my desktops at home and work. I find it very ergonomic and natural to use. It took a day to get used to not moving the unit like a mouse, but now it is perfect.

I've used Logitech's trackball mice for over a decade. I have 3 of their old ones called the Logitech T-RA18. These were superior mice and only GOD knows why Logitech discontinued them! I have now bought the M570 for a lot of money but I'm so disappointed I could cry.

A well-rounded trackball for laptop and desktop users alike.

I have fairly large hands and do not have a carpel tunnel situation but wanted to try something new. The trackball fits my hand well and, though, it takes a while to get use to using, it's pretty fun!

Excellent! I could never go back to a normal mouse after using this trackball. Several people at work have bought them after trying mine and are also well & truly converted! Build quality is superb and delivery from Novatech was super-fast, as always.

I would buy again. Actually I'll probably buy one now just so I have one if they change the design. Old dog, new tricks and all that.

I've been using this for about a year now and I'm very happy with it; Take the time to adjust the up direction in the software, it's way easier than learning "up"; I've dropped this thing so many times I've lost count; It still works.

I wish it had a few more buttons; I got the extra two programmed to "hide" and "unhide all" in Sketchup; Great for long trips, I even do CAD work in the truck when we travel; If it had more buttons and a lower price I'd give it a fifth star

This is an excellent product. It is very useful if you are using a laptop whilst sat on a settee because you can use it on the arm of the settee when a standard mouse needs a flat area to work properly. It works well with games or just navigating around. I would recommend to everyone.

I have been using trackballs for over 30 years. I have 2 of these, one for home one for work. The one at home I've had for 9 years and just recently required replacing. I was pleased to be able to get the same model again.