I bought the 40x12x48 and it is not a Lite-ON unit. It's Accesstek or Optirite (still trying to figure it out).
I do have to say, however, that this drive is really nice. It's not too loud, it does indeed burn 40x at outer zones, it burns 32x on my 16x media with no problems. Burn-PROOF is built-in and works (it may be JustLINK or some other thing, NERO thinks its BurnPROOF however).
It copied all my SafeDISC protected CDs with CloneCD. Ghost Recon, Disney games, you name em. And yes I have the originals. But the disney games for the kid.. I'm glad to now be able to back them up.
I don't know.. LiteON isn't the only good thing out there. I bought my wife a LiteON DVD drive and I hate it, it's obnoxiously loud. My OEM Pine Technologu drive (an Artec GH-40) is so much quieter and just as fast... I would hate to have the LiteON instead.
Well, those are my 2 cents.