I knew, walking into the theater, that this was the beginning of the end. I remember the first time I read the book that I could not put it down. It was going to be very difficult to live up to my imagination this time. While I have been disappointed in the past (OOP as an example), I had my hopes high for DH. I can still remember when I read "The Seven Potters", I had this wonderful scene in my mind, and I could see how (with a ton of CGI) this would look on the big screen. I was not disappointed! Also, for what seemed to drag on forever in the book (hiding in the forest), was handled really well in the movie.
Kudos to the three young actors for bringing these characters to life, and in true form.
Just as Rowling's books got darker with each one, so did the movies. This one seemed to be a little more accurate to the storyline, however I still wonder how they will make up for not showing Hermoine and her sock-knitting for the freedom of house elves...
The concept was brilliant and helped to push the Trek envelope in a completely new direction. Pine brings an edge to Kirk that we always knew was there, and Quinto does Spock justice (although at times I was wondering if he'd try to open up Kirk's head with his finger to see what made him tick).
The only issue I had, as I do with most movies set in outer space, is there is no sound in a vacuum. Abrams had it right in some scenes (you only hear their breathing as Kirk, Sulu, and a red shirt dive through space), but not in all scenes. Maybe because the public expects their "Earth shattering Kaboom."
If Roddenberry (and my grandmother) were here today, I think they'd both be pleased.