Hi, I got as Xmas gift a LG GGC-H20L. It is a boxed version and came with Powerdvd (Blue Ray+HD DVD).
The purpose of my drive is to allow my htpc to run HD content regardless of the format. It is not pratical as a stand alone player but it was much cheaper than 2 players (BD and HD DVD).
I've just rented 1 BR and 1 HDDVD from local Blockbuster (yes, here they have both - still limited selection). It worked flawlessly, drive was silent and played without hitches. It is silent enough also.
My htpc setup: Enermax Liberty 500W, E6400@2.8GHz (for a silent but powerful run), 2GB Ram, P965 Mobo (Gigabyte DS4), 8800GTS, Seagate 250GB hard drive and the LG Combo HD drive.
TV: Samsung 40" Full HD 1080P
Regards