I just received this as an early xmas present from the wife. I've wanted to try a mechanical keyboard for quite a while now, and she went out and bought the best one, which happened to be on for 33% off at memoryexpress (our big mailorder place in western Canada).
In a word or two: It's effing amazing. The difference in the accuracy of the keystrokes compared to a normal gaming keyboard isn't describable in words, you just have to try it to believe it. It's so precise it feels like going from a large pair of garden scissors to the accurate little ones on a swiss army knife if you were cutting something tiny.
They keys do make a bit of a loud click/snicky sound, but you quickly get used to that. There is a quickmode button to turn off your windows key while gaming, and 5 macro keys on the left side that you can program to do pretty much anything, any windows command or keystroke you want, but that's about it for extra type features - it lacks the 2000 functions of say a Logitech Gwhatever keyboard, but has it where it counts for performance. It's VERY heavy, and made of very high quality materials, and yet very simple and elegant. It has 3 lighting levels, again very simple, and one USB and 2 sound plug ports on the right side. The software for it is on Razer's website, they didn't include a CD, which is something that doesn't really stress me that much, as I always end up losing the microsoft mous-ish type driver CD's anyhow, or they are already out of date when you open them up nowadays anyhow.
They make a cheaper version of this keyboard for about 70 dollars which lacks the background lighting, this one was 100 after the 30 dollars off, but I've seen them go for around 110 in the USA.
You wouldn't think it to be a big seller, and it isn't so far, but the company put 3 years of R and D into this thing apparently, and it shows, is it has only the things a gamer really needs, and performs like a cat on fire. I bet it's improved my typing accuracy and speed by a factor of 2 as well. Considering you use your keyboard more than any other thing other than arguably your mouse, it should be something you invest some money into. Mark my words, 5 years from now nearly EVERY high performance or "gaming" branded keyboard will be using a mechanical type of system over the old membrane type. If you get a chance in a store (best buy carries them in the USA), absolutely give one a go, you won't be sorry you tried it. Next to the saitek combat peds, this is the best thing I've added to my PC setup since I've been using one.