My son seemed to really like it...the problem we kept having was an error kept popping up about 10 minutes into the game. It may be a really good game...we may have just received a disc that was messed up and our system was having trouble reading it. We had just finished playing a game for about an hour before loading this one.
I can't really rate this one because of the error that we kept receiving.
My older kids actually liked this game. Even though they are a bit young for it (8 and 6) they still played it well. I am going to buy it for them for Christmas (not the game fly copy). A local used game store has this little gem in stock and I will be adding it to my collection. Sending it back to try out others in my queue. One major upside is that I didn't have to spend all day teaching my six year old how to play it (the controls are instinctive). Having great hand eye coordination isn't really required for this game... If they can play Wii sports they can play this game.