I can safely say the movie is awesome. PJ captured the light-heartedness of the book brilliantly, but it still feels like the Middle-Earthe created in his LoTR movies.
I was worried abour several things: the CGI, the added stuff, and the fact that the movie was split into 3 parts.
So first, the CGI. I heard how cartoonish it was and that it was overused, but after watching the film, I have to disagree. The CGI was consistently good. There is a distinct style, much different from Lotr. That's a fair reason to dislike it, but I feel like it fit the lighter tone of the movie. I can also safely say that there are still plenty of stuntmen in goblin suits.
I didn't like the idea of added stuff at first, but as a Middle-Earth nut, I can't deny that it made me smile to see Dol Guldur (I want to spoil that scene so badly) and the White Council (Saruman!). On the other hand, the whole plotline about Azog seemed a little unneeded, but I'll need to see the other movies before I can really say how I feel about it.
I still think The Hobbit should be two parts, but I'm accepting of the fact nonetheless. Atleast with 3 parts, there will be plenty of time to allow the smaller details of Middle-Earth to be shown. And more time in Middle-Earth is never bad.
And for the true lore fan, there are many name drops that only someone who has delved into the depths of Middle-Earth will get. MINOR Spoilers, my favorite is when Gandalf discusses the five wizards. Instead of making up names for the two Blue wizards, Gandalf simply states that he forgot their names.