Seems like an awesome deal on a 16x drive. My holier-than-thou comments:
1. Burn-Proof is extremely overrated. Yes, I own a Plextor with Burn Proof, which makes me one of the cool kids, but the FOUR other burners I've owned were all without burn proof, and the few coasters I ever made were more due to stupidity on my part than a failing in the drive. Burn-proof is a great thing, but it is in no way worth an extra, say, $100 per drive. Don't worry about not getting burn proof when the drive has an 8 meg buffer.
2. The Yamaha drives are incredibly good drives. However, the reviews make it clear that, like the TDK, they only offer "up to" 16X burning. The review of the new yamaha at CDRInfo makes it clear that the drive takes a long time to ramp up to 16x, so while you may finish a disc at 16x, you won't start there.
3. Audio ripping is a big deal if you're into burning mix CDs, and the Yamaha drive won't rip audio anywhere near 40x. Still, you probably have no NEED to rip audio that fast. Just pointing this out.
Overall, if this is REALLY a Yamaha (and I'm not convinced it is, buyer beware), I'd say you can't go wrong at this price.