DH1 surprised me with the frequency and quality of comedic moments. The actors have really worked on their timing and it shows, particularly in scenes with Rupert Grint. Dialogue was wittier and more crisp than in past HP movies. The negative surprise was the number of times I found myself checking my watch and looking around the theater. HP books are burning page-turners, and the movies should be no less. Several scenes should have been edited considerably - the pace in them was like molasses. Overall, however, it was worth seeing.
The version of Half-Blood Prince I saw in the theater would have been fantastic if it had been complete. The parts of the story that were filmed were for the most part well done, but so much attention was paid to unnecessary parts of the story that several key points of the plot were completely left out. Being realistic about filming a 600+ page book, I didn't expect every detail in the movie, but how can the stage be set for the seventh movie when so much is missing from this one?