The first Assassin's Creed was an amazing experiance from start to finish. Repetative gameplay aside the intriguing story really pulled you in. AC2 has that same high quality story but with even better gameplay making it superior to it's predecesor in every way. There's lots to do as you run around Renesance Italy killing dudes and ultimatly trying to restory your families lost honor.
If you like stealth games and love EPIC mind-blowing storylines then you should buy this game!