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.

The classic trackball mouse belongs to a niche crowd, but after using one, it's hard to go back to the more mainstream point-and-click method of navigation. Logitech has introduced a new wireless trackball solution (via USB adapter) into this underrepresented category of computer mice , the M570...

Good feature set; Solid performance; Comfortable, natural design; Plug and play experience

Scroll wheel and browser buttons placed a little too far forward for tiny hands; Scroll wheel was too resistant

Mouse is super lightweight and does not feel/seem premium... hence the price. I do have some concerns about the small pads on the bottom that keep you from sliding the mouse: until you get used to a trackball, you will naturally try to slide it around like a laser one; and the small pads may come...

This is my third Ligitech trackball and the best so far. The ball is better supported making it easier to move with no drag. There are a few new features with this iteration that add value, like the ability to program the buttons to you liking. All in all a better product at a fantastic price.

I have used the Logitech trackball devices in all their incarnations from the very first up to this newest version. They have all been great products that have only improved with each iteration. The ease of use, and the lack of wrist movement make the trackball a great choice.

Style; Dependability; Features; ergonomics

price

If you're a long time reader of VH, then you all know by now that I hate mice. Literally, I just don't use mice, I don't personally review mice, nor do I get excited by a mouse. I am however completely addicted to my thumb controlled trackball.

Awesome mouse! You don't need a lot of space for this one, since it's not the average type mouse that you have to move all over. All you do is click and move the roller ball, so simple! I will admit it took a little getting used to at first, but now, I love it!

Mouse-like really feel. Wireless connection has been flawless. The storage compartment inside the unit is a wonderful concept. Very comfy. Quite nit-picky factor. The edges are so rounded that I have a challenging time choosing it up when I want to move it off my desk.Really, it's flawless.

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

It's biggervthan I expected but as soon as I used it, my wrist and hand were relieved from the usual pain caused by holding a traditional mouse. If it was a bit less bulky it would be a 5star product.