they are OK, though lately IBM is starting to go downhill.
People first were saying they were the fastest & best, now all you hear is problems.
Maxtor started off as being bad ('cause of ATA133 standard) 'cause everyone saying just a marketing gimmick, but they proved to be about as fast as an IBM drive but cheaper & not as many complaints.
Believe me when I tell you, everyone has good & bad experiences with all drives/brands. I think western digital make some of the worst drives (but others love it). Likewise Quantum made the best & fastest & also some of the worst drives ever lol.
Just stay away from the 75Gig & 120Gig IBM drives & you should be ok (those are the ones with some issues I believe).