Just saw this in IMAX/3D/HFR and it was really good. The first scene when the guy comes out of the pub......damn, I had to have been standing in the street with him.
I'd echo most of what was said on the last couple of pages. The differences from the book were reasonable, although I would also have liked more Beorn. Scenes with Smaug were amazing, and the run down the river was a really fun ride. I took my teenage daughter, who wouldn't typically go to a movie like this. However, she really liked it. Well done Peter Jackson.