I needed urgently a new mouse because my old optical spirit had given up. That it had to be optical, wireless back was clear, but what ?? Rummaged belongings came across the MX700 with the consistently good reviews and thought that is it. Only I was skeptical because it is a right-handed mouse and I'm that left-handers. After a brief try at the store but I was sure it goes that way. And really I use it now for over a month and I'm thrilled, especially when you're traveling a lot on the Internet, it can not give anything that better in the hand has (even in the left) and such wonderfully practical functions. So do not hesitate to buy)