After watching the movie, I couldn't wait to get started on this game. Personally, I found it totally awesome! I love how you use the Wii remote to cast spells. And Quiditch games are much improved.
Although I loved this game, I managed to finish the main story in half a day. This is why I gave the game 4 stars.
However, there is still a lot to do like Quiditch games, Duelling, Potion making and looking for the 150 shields dotted around the castle and the castle grounds.
All in all, I think this is a very good game. An appropriate reflection to the movie.