I don't think it's a very good sign that I fell asleep during the entire Elf sequence at the beginning (half an hour). Benedict Cumberbatch as Smaug completely saved the movie, and his voice was magnificent. The motion capture on the dragon made him look animatronic at points.
The problem with this "trilogy" is that Jackson and co seem to have forgotten about the Hobbit book altogether and are making some straight-up LOTR prequel. Legolas was there for some ****ing reason and there's the whole Necromancer subplot (as someone said here earlier, Smaug is a good enough villain on his own) and overall all these references and ties make the film feel unbalanced, and that was the same with the first one. Admittedly, entertainment-wise I preferred it to An Unexpected Journey but the script for this one was worst. Maybe it's just because I hardly remember anything, but it didn't seem like Bilbo, Thorin, Gandalf or anyone had any character moments at all. Bombur still hasn't said one line in both films. If they JUST focused on actually adapting The Hobbit then both movies would have been so much better.
3/5, and that's generous.