I saw Harry Potter and the Deathly Hallows Part 1 about a week ago, and I have to say I've really enjoyed it. I only recently got into the films and it was obviously my first Harry Potter I ever saw in theaters.
Being split into 2 parts makes an easy cliffhanger but I'd say they left off kinda well. I would've stayed another 2.5 hours to watch the rest of the film. Or you could just read the book. It's also funny to see how much the series has matured over the years. Having a hogwarts teacher fed to snake probably would've caused a lot of alarm to kids watching the first movie.