15 bucks? dont hesitate, buy it!
I enjoyed Mafia 2 for PS3 (borrowed it from a friend).
The Story is very good
and i even thought the graphic where stunning.

sure Mafia 1 was at its time something unique and perfect. but mafia 2 can stil keep it up with its predecessor.
If you played Mafia 1 and u liked it, play Mafia 2 and even if you dont like it, which i doubt, finish the game...in the end you will know why.

i can recommend it.