First of all, I have to say: I adore typing on this keyboard. The switches are absolutely excellent, and I don't think I could ever go back to non-mechanical switches.
There is, however, one slight downside to this keyboard. The build quality of the casing itself. While not shoddily put together, it just feels slightly cheap. The printing on the keys is clearly done using a.. cheaper process. You can feel the lettering which, while I don't mind, might bother other people.
Overall, typing and gaming using its clicky, tactile switches is a delight. The only downside in my mind is the slightly cheap feel of the casing itself. It does feels more expensive than a cheap £10 rubber-dome keyboard's casing, mind you. It's certainly sturdy, it just.. feels a bit cheap.
While I'm happy with it, I'm seriously considering getting myself a DAS Keyboard. It is about double the price, but I'd rather have that bit higher build quality on the casing.