This game is surprisingly well done. I wasn't expecting something so addictive when I had bought the game.
If you are a big fan of Monster Hunter series, this game will impress. Essentially it is with Guns, and not swords.
Multiplayer experience is the key in this game. Single player experience isn't that great but when you play with your friends, this game becomes great. You'd need a good sized TV to play split screen though. I have a 24" screen and its too small for it in multiplayer. Still doable, but not that great.
This was a great buy for the price I paid. It is an awesome game that definitely goes on my favourites list for PS3 games.