This game is a good break from horror, action or any other genres, and is made for plain simple fun
The waterslides and other sports would have worked perfectly here, so the missing parts are the fact that while volleyball is great fun (and a classic for even a sports fan i must say) but it still feels like it should've been more fulfilling, as even the volleyball still sometimes feels like a 'minigame'. If only they added a few more minigames, and a few more characters, this game would've been the bomb.
The graphics are the best you will ever see on the Xbox, no arguments here. The game has some very relaxing music to listen to while playing making it a nice break, and makes this a good addition with a great new atmosphere and approach to most sport games out there.
My conclusion is dont let bad reviews turn you down or make you look the other way, for the current price its available for (about 10 dollars used), this game is a good example of what plain fun is with the new sport that is volleyball.