Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Rock Solid

I had a problem with my first one and had to get a replacement, but it was after I switched batteries and it could never get connected to the base again.But if you leave it alone it works like a gem. It's a bit heavy in the hand, but not uncomfortable unless you play games for hours on end without a break. I absolutely LOVE the scroll down/up buttons. I haven't even installed the Logitech software that allows you to personlize the mouse and I'm positive that makes this even better. A very positive 5 Stars.