I love it.
Key features that made the keyboard best for me:
-Central "media center" control (volume, next track, play, pause, etc.)
-LCD screen (compatible with Ventrilo, allows me to see who's talking when I'm in a full screen program)
-Backlit keys (nice for doing things in the dark, plus it looks awesome; switch to dim or disable the lights as well)
-Toggle switch to disable the Windows key (awesome for anyone who's ever accidently hit it while in a game)
-"G Keys" for shortcuts and macros (ability to record macros on the fly, especially awesome for common phrases like BRB and AFK, or slash-commands in programs)
-Two USB ports (though only USB 1.1)
In short, it's an excellent keyboard, and well worth the money. I actually use the G Keys all the time for things like /target blah-blah-blah in World of Warcraft, or yTextMessage<enter> in Counter-Strike: Source. I believe you can also set them to open programs and more complex tasks. The buttons above the G keys toggle different sets of the keys (three in total), so you actually have 3 sets of 18 G keys to assign at any given time.