Bests & Worsts Reviews from Amazon

Product fits in my large hand very well. Love the fact that it uses 2 AA batteries that last for 4-6 months. However, after only a month or so of use, the left mouse button becomes erratic, not always accepting the click, or double-clicking when a single was called for. Mostly ignoring clicks I try to make. I thought that I just had a lemon ... so I bought another for my laptop because this is so comfortable to my hand. I was wrong, as the 2nd one had the same problem. It's very disappointing, as I have used Microsoft mice for the last 2 decades without complaint. Sorry Microsoft, it is an ergonomic mouse as claimed, it's just not a quality computer mouse.