I got a Razer Lycosa keyboard for christmas. I know there will be some of you who hate and some who love. It's a marmite thing. Anyway, the reason I wanted one was due to the low profile keys, and the cool looking backlight.
Anyway, to the review itself.
The keyboard is pretty cool. It's got 1 large wire coming out of it which then junctions to 4 smaller wires - 2 usb 2.0 and one 3.5mm Mic and one 3.5mm speaker/headphone. One of the USB connectors is actually for the port on the back of the board to which you can plug things in. I'm not sure how effective this is, nor am I sure how effective the 3.5mm ports are on the basis I didn't plug them in - don't have a need to.
The keys themselves are pretty dark when the backlight is turned off. Unless you know a standard QWERTY layout by heart, you're gonna have a bit of trouble without it. Other than that, the backlight has two other settings. WASD mode, which lights them up in a light/bright shade of blue, and fully lit which backlights each key, albeit a darker shade. I must admit the fully lit setting isn't consistent across the board - The F-keys and some keys towards the top left are left a bit dim, but still readable.
The keys are rubberised, which take a bit of getting used to, especially if the previous keyboard had the key surface worn down due to excessive use (Logitech Wave represent).
The new layout took a bit of getting used to, and I still have a habit of pressing CAPS instead of SHIFT (which can be a gigantic pain at times), but it's all there.
As for the media board on the top right, I feel a bit dumb, on the basis that with my previous keyboard mentioned before, it automatically worked with media players (my main one being winamp). This though... ehhh.. Originally when I tried (& failed) at using it, I thought it was a driver issue. Turns out you gotta enable it within the media player, however finding the option is a bit hard, but it works. I just wish that pressing the razer symbol, or the snake heads, would just like open up certain apps, as on my last keyboard, as on my old one, I found it usefull fo have the calculator, Media Launch and Mute sound at my fingertips. It's a bit more work but eh.
Oh, this may just me my keyboard, but after about a day of use, my S key started getting friction and making some related noise on use. To fix it I just pried it out with my finger, licked the underside of the key (to act as a kind of lube :V) and stuck it back in. No problems since.
To a conclusion. The keyboard is nice, however it lacks some things which I think would be beneficial. There are probably better keyboards out there and more expensive, but this is just my view on things. It's certainly not something to avoid.