I know membrane keyboards are blasphemy to some people nowadays, but I've had this keyboard for about 3 years and I love it.
I use it constantly and I'm not gentle with it-- I type after eating greasy fast food, spill small amounts of liquids both hot and cold over it, and beat up the space bar in games and to watch videos frame-by-frame.
Haven't had a single problem, and the only indications of heavy use are very slight wearing of the S and D letters. The low cap keys lend themselves to quick typing, and it has very solid anti-ghosting which is useful for things like rhythm games.
The dedicated media buttons are handy and the backlighting is sweet.
The only real con I can think of is that the glossy surface attracts, or at least makes visible a fair amount of dust (think PS3 phat levels). Due to its large surface area and the matte, cross-hatched material of the wrist-rest, it's generally a bit of a pain to clean.
I can't deny the clicky allure of blue-switched mechanical keyboards, but if you're looking for something quieter this is a solid choice.