I saw the Hobbit yesterday and I enjoyed it. I was not expecting the book, but I do think some of the changes were a bit too much.
I consider myself a huge Tolkien fan. I have read The Hobbit and the Lord of the Rings 12-14 times over the last 30 years. I have read the Silmarillion a couple of times and I loved it. Really. I have read many of the lost tales, the Tolkien Reader and tons of his works. So I am approaching this as a fan.
I liked the bits with Gandalf at Dol Guldur, that was all in the Lord of the Rings and expanded tales, so I am 100% fine with that.
The CGI didn't bother me. In fact Smaug looked fantastic.
I liked the addition of Tauriel. Yeah she was not in the books, but I don't care.
But the movie was too long and some of the things added to the movie had no real benefit.
In many ways the movie was exactly like the giant golden dwarf statue in the movie. Large, overwrought, a monument to excess and ultimately ineffective.
So in the end I didn't enjoy it as much as I wanted, but it was still a lot of fun.