Interestingly, Rowen pointed out some plot inconsistencies in the story (such as Harry and Hermione accidently leaving the invisibility cloak at the top of the astronomy tower when they knew that people were specifically looking for them to be out of their rooms). However, he still enjoyed the story immensely, and was utterly convinced that Snape was the bad guy all the way up to the final chapter. In fact, the final twists had him with his eyes open and his mouth wide for nearly the entire chapter.
As we finished the book, we also took the time to watch the movie that stuck with the worse of the title options. Rowen enjoyed pointing out the changes and was particularly happy that they cut out the entire subplot about sneaking Norbert out of the school as that meant that the plot problem I noted above was no longer an issue. He still didn't understand why the teachers would send the students into the forest full of dangers at night as a punishment when they were being punished for being out at night.
He said that he liked the movie too and that he was looking forward to reading the next book, but that he wishes we could skip the first part of each book because he really doesn't like the Dursleys.