I have one and have burnt 1:1 copies of movies. It works perfect w/ dvdXcopy (most notably LOTR). I've also been burning my PS2 games at max speed (2x, but the drive goes 4x - media thing), and i have never had a problem. Don't even need to verify... cuts down on the burning time by like %50 .
Very good burner, i recommend it
btw: cd-rw = 16x burning.