This is a really nice mouse, it has 5 different styles you can switch back & forth to. I just wanted to buy a solid higher grade mouse to use that has better response. It has a good amount of bells & whistles, if fact more than I'll ever use. Easy no problem to install, total compatibility with my W7 Dell. It says it's for righties but because I have some tendon problems I started to train with my left & it feels fine. OK now the only problem and I wish I could get it touch with the company, after about a half hr. of use the scroll wheel starts to squeak off and on, I'm at a loss in trying to fix it, maybe they have a idea?