Not so sure on the "redesigned" part of the new regulator/motor units. I replaced my passenger front back in April of 2006 after it let go (right as I pulled into the house 200+ miles away from home at the beach, with no tools.....learned a good lesson that night). Drivers front let go back in September of 2006. I'm already hearing some popping from the passenger front, and the drivers front snapped IMMEDIATELY after I installed it (and yes I had I installed it properly).
From what i've been seeing on here, they're now retailing $200ish from the dealer, where they used to be $100.
When (note I say WHEN not IF) they break again, i'm going the repair route listed above.