I just got mine back today from this recall. I don't know if it's a factor that I never stressed the battery (only about a single cycle per week), but I never had any issues with it.
My main concern was that they didn't "mess up" anything else with it since it's the best laptop I've ever had. Somebody in a related thread said his got back with case damage, one USB port non-functional, etc.
FWIW, I can confirm that mine definitely did not receive an entire top case with new keyboard, etc. It only got the battery replacement. It's interesting that some folks are getting all that new stuff. I wonder what causes some to receive all that and others like myself to just get the new battery?
Anyway, there is nothing amiss on it and everything is working fine (phew!). Also kind of nice to see that "Cycles: 0" in system info...hehe. The only thing left to worry about in my mind is how long before *this* new battery explodes and blows me up. If they didn't know before, could they not know again...? :/