I bought this mouse 4 years ago, during this time I changed 3 computers, and this mouse still serves me faithfully. No complaints. Initially I saw a friend, our hands are about the size of one, so I bought myself one. Everything is fine, lies like a glove. Inside was a weight, artificially weighing the mouse. Removed it and it became more comfortable to use. I use it for games that do not require frantically waving the mouse and for surfing the Internet.