Last night, I watched Harry Potter and the Deathly Hallows: Part One (Yes, I am a early adopter/innovator). I enjoyed the movie until the last part, where the movie abruptly ended. The producers have decided to present the last book in two parts in order to cover all the details, and of course to make more money. I think this strategy has both advantages and disadvantages. On one hand, it allows the movies to be more entertaining (since more time has been put into each movie), and increases the revenue. But on the other hand, some customers may be frustrated at the cliffhanger ending in Part One, thus causing a negative attitude towards the Harry Potter franchise.
Note** Harry Potter and the Deathly Hallows: Part One has been wildly successful at the Box Office. According to AFP news, it made 61 million on its first day, which is the fifth best opening day ever.