Okay, maybe not worth a seven, but not as bad as everyone makes it out to be.
What lead to this games down fall is that, on the wii, they did not utilize the motion controles the same way they did with the sixth. If the developers had spent some actual time on this game it could have been an AMAZING harry potter game. Instead they choose to do the predictable thing. The story is what you'd expect and the 'A' button is your attack button. That's essencially the game in a nut shell. There's some nice stuff to look at but that's it. It's not the crap people make it out to be but it 'aint great either.
If you're the kind of person who plans on being burried with thier harry potter books (what? Just me?) Then this game is worth renting. The only reason to buy this game is to add to the harry potter collection.