[Gervy]

I did the update. Find my device much snappier, and seemingly better battery life.

Upon power cycling, it loses your GMAIL/GOOGLE password, so that's a minor annoyance. (Especially given I almost never power-cycle the phone).

Will not have live-wallpaper as this was deemed too powerful for the Eris and even Motorola Droid. (N1 feature only, I believe).

Navigation is awesome.