My wife recently bought me this keyboard. At first I was a bit taken aback - I was used to my keyboard and this one was rather different, but a couple of days using it have shown me just how good it is.
The keys are lit up, and look lovely. The colour of the light can be altered using the software provided and can range from a deep red to a light blue, or anything between. The red is really very striking and probably the brightest, but I prefer the look of the blue (it goes better with my mouse and my case lighting). Even though the blue is not as bright as the red, it's still plenty bright enough to see clearly in daylight. There's also a button to turn the lighting off and on with a single press.
There are 12 programmable keys on the left hand edge of the keyboard. These can be set up with macros, and they can even be altered/programmed on the fly. You can have up to three sets of commands programmed, and switch between them easily with buttons at the top left of the keyboard - and to make it easier to remember which set you're on now, you can have a different key colour associated with each. My only gripe with them was that when I first got the keyboard, I kept hitting one of the programmable buttons when I meant to hit shift - easily remedied by setting that button as a shift key.
The keyboard has built in audio jacks (for headphones and mic) and a USB2 port. The audio quality is crisp and clear, and the on-keyboard media controls are easy to use, well-placed and work exactly as expected. The USB2 port isn't powered, so don't expect too much from it but it's perfectly adequate for running a mouse or any self-powered devices.
Now, that all sounds great, but what are the down sides? The keys are slightly smaller than on a standard keyboard, but after a couple of hours use, you likely won't even notice - it certainly doesn't bother me any more, and I was rather worried that it would be an issue as I'm a touch typist. The legs that it stands on are fairly small, so the keyboard sits lower than I'm used to, but I've not had any problems using it as such - again, it just takes a little getting used to. There's no LCD screen, but I've personally never seen the need for one.
Overall, I'd give this keyboard a big thumbs up. It's well crafted, feels great to use and does the job admirably.