Im an FPS gamer myself (mainly CS:S). Since i alwyas get involved in games the clock on the LCD eralyl helps me, but im sure thats now what you want to know, lol.
As for the programmable buttons, i programmed mine so G4 gets me a m4a1, so i can just press the buttons "G4"+"G10"+"G11"+"G12", and that buys be grenades and weapons.
Forgot to mention, the backlighting is realyl cool and works very well, and it also has Media control buttons.