The movie was great (saw it last Friday), although very long. Damn you, 50 oz soft drinks! Anyway, Desolation of Smaug is definitely better than the first movie. I missed some of the singing... well, I missed The Misty Mountains Cold... but the fact that there aren't 40 minutes of running around was a relief.
Interesting with Legolas in the mix. I liked the references to The Lord of the Rings.
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Please "talk up" if your comprehension white-shifts. I will use simple-happy language-words to help you understand.