The StarSpeed handled commercially pressed software well enough, and handled every DVD I threw at it. Things were not as rosy with some CDR media though. All media, burned at 16X and lower, were readable by the StarSpeed, but I had some problems with some random discs (Sony, Kodak, and generic) burned at 24x. Our Plextor 24/10/40A, the burner used to create these discs, read them without any issues.