Terrible. Waste of money. I've had it for less than a month, and it disconnects every minute. To reconnect it you have to go into settings, unpair and then pair it again. Water of time and money DO NOT BUY!!!

Not sure why people complain of this being laggy and going to sleep. It works just fine. For the price, it's worth it.
It is well shaped and has a few extras you wouldn't expect on a mouse this price.

Comfy design, slick look and soft click very fast and quiet. Great

Keeps on going to sleep, slow to respond - on the plus nice feel and fits well into the palm of your hand