Whilst I think they did the right thing in splitting Deathly Hallows into two movies, Part I was just unfortunate that it got the worse half. Like all Harry Potter movies, the story makes sense, there are little to no plot holes, it has great acting and a great story. As it is the first half of a book, the story is quite slow and dragged on compared to other HP movies and for that reason it suffers. The other thing that lets it down is by this point is that both one of the best HP characters Sirius and Dumbledore are dead, the absence of these two truly entertaining characters lets the film down a bit.