I caught HP4 on Imax format @ Omni Theatre on Saturday. Voldemort looks terrifying indeed. I could see his features really clearly. What I liked was Ginny's bigger role that meant more lines and more screen time.

On the whole, the latest film is even darker than the previous ones as things started building up. A pity we did not get to see Dumbledore's argument with the minister of magic at the end.
A lot of things were chopped from the books. Quite a few holes appeared as a result.