I haven't played the PSP version. I generally play with my PC, I guess that there are limited stuff at the PSP compared to the other gaming consoles.
Completed the game the day before yesterday :3
Assassins Creed II was a great game. I enjoyed it a lot more than part I too
Rented it and I've played it quite a bit. Truly a fantastic game. Improved in every single way to the first one. Really wish I'd owned it.
If Modern Warfare 2 weren't a shoo-in for GOTY I'd put this as the front runner.