Some snips from US Microsoft employee testimonials:
"This is information we as a team, optical disc drive team, knew about."
"360 was routinely scratching discs"
OMG they completely screwed people, they put in drives known to have the same problems. Just to give customers the idea they get a new device (paying 100 dollars!).
"Just to give the customer a new optical drive, so that from a customer perspective they're getting a new device and that improves customer satisfaction"
........... Wow............