Once you've set up your mouse just the way you want it, you can actually load the profile onto the mouse itself, so if you want to bring your mouse to a gaming event, it'll keep your exact settings without having to install any special driver software. There's a small black-and-white LCD display on the bottom of the mouse that you can use to change mouse profiles on the fly, and it'll show your image of choice when it's idle.

The mouse itself feels comfortably large, close to the feel of the classic Microsoft Intellimouse. The side buttons are a little bit too easy for me to hit with my standard grip, meaning that I get a few accidental back/forward commands while I'm browsing the Web, but it hasn't been a problem when I'm doing something more focused like playing Starcraft 2. The surface of the mouse is an attractive metal-coated plastic that looks good and feels a bit lighter than my Razer Naga, and the mouse buttons are responsive and give a satisfying click.

The Sensei won't revolutionize your game overnight--at least, it didn't revolutionize mine. (I suspect this is because I spend too many hours in the office and not enough playing games.) If you're willing to spend some time getting the Sensei to work just the way you want it to, it will definitely reward your patience with excellent performance. If you're a budget-minded gamer who doesn't usually tweak your tools much, however, the Sensei might be wasted on you.