Don't call him Teddy Ruxpin
The cgi was great. He looked like a toy teddy bear and interacted with things seamlessly. He had facial expressions that weren't very far off from the expressionless toy bear.
The girlfriend seemed to abruptly switch gears just before the end of the movie but then I remembered that John had been dating Lori for over 4 years when the movie begins so obviously she was friends with Ted for 4 years. When you consider that, her behavior is perfectly reasonable.
I was wondering how they would address the media knowing about a living toy bear & I think they did it well by treating Ted as a former child-celebrity who people mostly forgot about. I also liked that the movie made it clear that it was magic from the beginning. It was nice seeing young John with his bear friend & watching them grow up. The movie tried to have a few touching moments sprinkled though out all the R-rated humor. I think it had the right amount of dirty humor, love story & bromance.