Pros: Bought this to remove some clutter on my desktop. This mouse has been perfect since I bought it in Dec of 2014. I use it everyday. Still using the original battery. Buttons wok smoothly with a slight click.
Pros: It worked right out of the package as expected. I bought a refurbished laptop which is why I needed another mouse. It was some what smaller then what I was use to but works just fine. Takes less space up on my desk which I like.
Summary: Lots of other mice we've had don't work immediatly when left on for a while, like overnight, you have to click it once or move it around alot before the pointer begins to move. This mouse works immediately, first motion. That may account for it needing a new *single* AAA every couple months.
Pros: Smooth, small, NO power up time, NO wake up from sleep time, one AAA.
Cons: 60 days battery life instead of many months when continuously on.