Summary: This mouse has been very unstable.Sometimes it works fine, other times it jitters all over. For instance, as I was browsing the current deals, I discovered I had inadvertently put a gaming mouse in my wish list.I have never owned a gaming mouse nor felt the need for one, since I don't game. As I was trying to go to the next page, the mouse jittered and poof! I was back on the home page. I'm getting a new mouse today.
Summary: I really love this mouse! But as a gamer, under moderate to slightly heavy click use, this mouse has begun to malfunction within about six months after purchase. For more basic use, however, this mouse should do just fine.
Summary: Inserting the bottom battery requires attention due to the placement of the spring which makes contact with the negative battery terminal. The spring can easily be twisted and the battery will not make contact. Otherwise, seems to be a great product.