I've been using this for a couple months now and this keyboard blows the big one, half the time the keys appear to be fully depressed, but won't detect the depression (It took me 5 trys to type out that sentence, nearly all mistakes were in the WASD keys).
The back lighting on the keys blows, they're only easy to see when you're nearly ontop of the keyboard. The volume/playback area is crap, first off you can't find them under the keyboard drawer when you're playing in the dark since they're not actually buttons, secondly you need to tap the volume keys to do small adjustments or you'll accidentally turn your volume all the way up or all the way down. Thirdly you'll often miss them altogether, it'll take multiple tries even if you can see them.
The anti-ghosting feature is useless to me because I don't use WASD, I figured I'd get used to it when I bought the keyboards but that never happened. The keys are all at even height and don't slope like a normal keyboard, this makes it difficult to tell where you are vertically on the WASD area.
I hate this thing. Also of the last 2 mice I'd bought from Razer I've brought both back within two days, they always have some sort of problem that a $14 logitech mouse doesn't have. II've given them three tries, but I'm never buying a razer product again.