A good game. Much better than it looks! Its only downside is its length...
The graphics are gorgeous. The sound is good (not great but good enough.) The great highlight of the game is its control. It is just perfect. All the third person shooters on the PSP should come with that control scheme (RE4 like).
The two downsides of the game for me are its length and the enemies AI. The game is not too long (but it is extremely fun while it lasts) and the enemies try to hide from you behind objects instead of hunt you, which makes the game not too challenging.
Anyway I really like this game and I recommend it to anybody who likes third person shooters.