Bad quests lead to boring gameplay, however the ending is wonderful.
Hogwarts is HUGE, fortunately you can use the Maurauder's Map to guide you to where you want to go. Unfortunately it leads you there with black footsteps. These are hard to see and sometimes stop for no reason. They are only one or two footsteps ahead of you so you will end up going the wrong way because you can't see where it is leading you.
As for gameplay you mostly walk around and do quests. Some people will love this others, quite the opposite, I really didn't like you recruit members of the D.A., a secret illegal club Harry sets up to teach Defensive Magic, most of the game. Then ALL 25 of them have some whiney story about why they won't or can't go. Some of them are stupid like: I need to find Gargoyles and But that owl stole my package. But you get through them. And there is probably nothing more fun on the Wii right now than to play as Dumbledore against Voldemort. Unfortunately, while you can go back to Hogwarts once you beat the game, you can't replay your favorite parts, The Occlumency lesson's controls are probably the most unresponsive of all the games on the Wii now. And you have to do them FOUR times. However that wonderful fight between Voldemort and Dumbledore saved that part.
This game is one of the most detailed titles available on Wii. Coming in the normal 16:9 widescreen presentation and 480p. Very good graphics.
The actual actors from the movies voice their respective characters which is wonderful. I HATE sound a likes. Cool sound effects add to this already authentic experience.
This game is worth the money depending on whether are not you like the quests, since they are the bulk of the game.
All in all I really like this game. Of course I'm a Harry Potter Fanatic but I would like to thank EA for making the controls for this game on Wii GREAT instead of tacked on. Thank's EA.
My advice: If you like the movies or the books, it's at least worth a rental. If you hate Harry Potter, it's at least worth a rental.