In order to receive the glut of new HD channels I was sorta forced to switch to DirecTV's HD DVR from my HD DirecTivo. I liked the Tivo unit a lot but the HR20 won me over big time. I think the interface is far better than the Tivo. I wouldn't think of switching at this point. And mine isn't buggy at all. I haven't had a single problem with it.
I always think choice is a good thing though. So this is potentially a decent move for the company.