The BWU was one of my first mechanical keyboards a few years ago (the other being the Das Keyboard from the same time).
While my Razer Imperator mouse gives me intermittent problems (although is great when it works properly), the BWU hasn't missed a beat. It's worked flawlessly, including the backlighting.
The case is possibly the most sturdy that I have. It doesn't move at all, it's heavy, no squeaks/rattles... nothing. I'm not crazy about the gloss black finish, but I knew about it when I bought it (and the DAS is the same). I can't think of any way they could have improved upon the case build quality. It far exceeds that on the DAS and Realforce 87UW that I just received.
My only issue with it is the keycaps. Now, I know they have to work with backlit, but they are so tinny and brittle feeling, and the paint wears off them (not from normal use, but keycap removers will scrape them). So, if I had to change something, it would be that... but around here, nobody sticks with stock caps anyways. Vortex is supposed to be releasing some PBT caps that will work with backlit, although the bottom row isn't the right sizes... so we'll see.
While I don't own the new BW tournament edition, I've used them several times at Canada Computers, and it feels quite good actually. I'm not sure how I would feel using it on a daily basis, but it's inexpensive to buy and a mechanical TKL that's available pretty widely. Not such a bad thing, that.
Like you guys have been saying, I do have to credit Razer for making an MX Blue/Brown keyboard available (well two, actually) years ago when nobody else could be bothered. Had they not, I'm not sure other companies would have taken the initiative to produce their own, and we might not have gems like the QFR. People like me might not have noticed mechanical keyboards (or at least, not at the time that I did), and that's sure a sad thought.
I still use my BWU pretty frequently, although we'll see what happens now that I have the RF 55g.