Summary: The Sensei fits well in my hand and offers lots of power and flexibility, which may extend to a bit of an edge in gaming. The Sensei worked on Windows 7 & 8 (using software from the website) and MacOSX 10.6 (software also from website, required two reboots). I received no response from it on my Ubuntu 12.04 Linux box.
Pros: This mouse is good looking and feature packed. It’s comfortable for long periods of use and offers a good feeling even with fairly large hands. Seems base-heavy, which really provides a premium feel. Its top buttons, wheel, and left buttons are easily accessed. Ambidextrous, if that's your thing. The Sensei has highly customizable software that allows access to all of the Sensei’s power. It offers the ability to create up to five separate game profiles. You can assign...
Cons: I’m not sure if I’m just not comfortable with the right side buttons, but they just don’t seem to be easily accessible without having to move my hand to reach them. The settings in the software seem to be lost if you do things not the way they were intended. The LCD panel being on the bottom is sort of gimmicky as most of the time you won't be looking at it while gaming, although you can change the settings from it.
Summary: I'm not a big gamer, so I can't speak for this mouse's performance under pressure. However, I do like the way it lightly glides and crisply clicks. I originally had the one that's supposed to minimize sweat, but returned it for the glossy model (the surface of the first one reminded me of a chalkboard...sweat from hours of use isn't a concern for me). The low-key design is also a plus for me. Works fine with my Mac, too.
Summary: This mouse is a game-changer. It gives the gamer wireless freedom. It's responsive and durable that delivers tournament grade performance. It has 8200 CPI, 30M clicks, 1MS response and 20 hours of battery life so it's the ideal mouse of the avid player. This mouse is very light despite being full-sized. It has an ambidextrous design, aluminum base and accents and sweat-resistant coating.