(A very un-scientific Harry Potter and the Half-Blood Prince review.)
If you like Harry Potter MOVIES, you will like this. It doesn't really stand out from the crowd except for a few incidences where their hormones seem to be catching up with them a bit, but Harry Potter movies are generally good so if you like them, you'll have a good time. That is, unless, you have ADD or a short attention span. This one is long.