I've had 5 boxes so far, and in my point of view, the NEW Philips drives are just as good as any of the Samsungs. I'd never want to own a Thomson-Drive again, though. Same thing for the old Philips drives - they were horrible.
The new Philips drives (from the 4th Q of 2003 and on) will read anything I throw at it though - I've tried 6 different CD-RWs, they all worked. I tried 4 different CD-Rs, they all worked. DVD-Rs, DVD-RWs, DVD+Rs, DVD+RWs... they ALL work! The new Philips drives are just as good as the Samsungs, IMHO. I haven't found anything that it won't read so far.