Bought for gaming (note not professional gaming!), comfortable to use, not too large, not too small. It has extra buttons to bind keys to in games. Same side buttons can be used as back buttons on the web - very handy. Turns itself off after 8 minutes of inactivity, a simple right slick turns it back on - I must admit that it is slightly annoying - but wholly outweighed by the extra battery life, it is a very good idea. No wires, sits happily on the desk, doesn't require a mouse mat, preferring a solid table. The cpi can easily be adjusted using the top button, something gamers seem to require, enabling the mouse to move faster and respond quicker. Neat little usb receiver that fits into the mouse when travelling, so ideal for laptops. Works well.