I have a Plextor-755SA SATA drive and have run into problems with AnyDVD and CloneDVD using Windows XP Pro. First, on doing a disc copy to a DVD+R DL disk (I only use Verbatim), what happens is CloneDVD reaches a random point in the write cycle and it goes off into the weeds with an infinite write loop (meaning never gets beyond that point, but the drive keeps spinning). I have had to kill the program and force a reboot of Windows to get the drive to reset (and get the coaster disc out of the drive). Also, on the same drive, which is set to Region 1, I cannot get it to recognize a Region 2 DVD with AnyDVD running in the background. On the first problem, I recognized that there was an Autoselection "advanced feature" that Plextor built in to "optimize" write strategy based on the media being used. "Autoselection" was set on by default. I switched it to "AS OFF" in Plextools thinking that it was somehow conflicting with Clone DVD. Oddly, this cleared up the problem for a couple of burns, but the problem came back shortly thereafter (with no further change in settings) for no apparent reason. None of these problems exist on my NEC (PATA) internal drives, nor on my Pioneer, LG and Samsung external drives connected through USB and Firewire. I'm not sure if this quirky behaviour is specific to Plextor, this particular drive model, or suggests problems with SATA in general.