I have three phones that are 002, what I know about them:
1. Mine, light leak at bottom, fair battery life (still working on it, but I can get through the business day with wifi and gps on, couple to a few hours of internet and games, few texts, calls, screwing around with the metal detector app, etc.).
2. Wife, since I turned off a couple settings, running like a champ, light use she could probably go two or three days without a charge. No leaks.
3. Daughters (16). Impossible to get anything accurate out of her. I made same settings changes, and she uses the heck out of the phone (and her friends, :shudder
She is charging a couple times a day and saying it is freezing up on her (haven't seen it).
I run ATK on all, turned off always on mobile data (which seems to have made the biggest difference). I have the purported "old battery" in each phone. I am also noticing a positive difference by relying on wifi as opposed to 3G in a crappy area with airrave, but it's too soon to tell for sure.