I agree... avoid the POS-712a at all costs. It is the least forgiving burner I've used, with the exception of the LDW-411s... but common, we all knew the LDW-411s was going to be crap!
With the PX-712a, you have the whole:
Hype&cost vs. picky&obsolete ratio, which is getting bigger and more agravating all the time.
If Plextor manages to fix these problems, then maybe some of my faith will be restored in them.
Mind you, despite that fact that the PX-712a is a picky burner, lousy reader, and overall overpriced piece of crap, I do love it for my own uses... Why? because it's a picky burner, and lousy reader

for doing media benchmarks, it's important to have something picky for testing. My general view is: if it works on the PX-712a, then it'll work on anything! (although I don't actually base opinions on this theory, it just seems to be true in many cases

)
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R
The Progression of Computer Media