I bought one of these a few years ago and it worked great until I lost the USB link. So I ordered a replacement last month and the scrolling wheel didn't work. I returned it for credit, got another one, and the same problem. Scrolling wheel skips up and down randomly.

As a mouse, it's fine. But the scroll wheel is trash. It will undo most of the scrolling that you do at the end of a a scroll.

This mouse scrolls really slowly, and it constantly scrolls up while you're trying to scroll down.

Horrible

The scroll wheel makes this mouse practically unusable. Scrolling up will scroll down half the time, scrolling down will scroll up half the time. The ergonomic design is nice and I haven't needed to replace the batteries in the hours that I've used it while working, but that is meaningless when the product can't do a basic function.

Less than two months after purchasing this mouse, it simply stopped working. Tried multiple new batteries.

I thought the mouse was okay when I first got it. The clickable keys on the side is a bit annoying, but it did the job. Until this week (less than a month from purchase) when it just stopped working.

At first the mouse was great but 4 months later the scroll wheel is no longer working properly unless you're super gentle with it.

it either scrolls too slow or even backwards. just a cheaply made mouse

Mouse is too small, poor design, clicks loudly. The shape of this mouse makes my fingers smash on top of each other uncomfortably along the side of the mouse and also makes my hand cramp. I have fairly small hands and still this mouse feels way too small for me. In addition, the click is crazy loud. The design has changed a lot from a couple of years ago. I don’t recommend it.