I decided to risk buying the Roccat Valo keyboard after reading a whole load of negative reviews. Gladly however after using it for a few days I've got to say I really like it.
The Valo is a big keyboard but looks fantastic, sleek with no cheap plastics. It took me a while to get used to typing on it, but once I did I found it really comforatble to use for long periods of time both in gaming and general use. The keys are soft with not too much travel which I like.
The Valo's 2 main selling points are the LCD and the masses of macro keys. The LCD on the top right is good but has limited uses: Date and Time, CPU + RAM usage and Email, thats about it. As for the macro keys, useful, but there's so many I doubt I could ever remember what I've got them all set up as.
Its got a couple of big negatives against it. As people have mentioned, the backlight capacitor produces a loud whining sound. I managed to solve this by turning the backlight off, not a problem for me as I dont need the keyboard lit, but this could be a huge problem for a lot of people.
Also the Roccat software crashes most of the time when I try to make changes to the LCD screen and macro settings.
I prefer the Valo over all my previous gaming keyboards, Logitech G11 + 15's, Microsoft Sidewinders and Merc Stealth. It is good, but only if you can live with its flaws.