I thought it was very good. Faithful to the book, so if you "enjoyed" that, then you will like the film. Viggo Mortensen is excellent, and the relationship between father and son, which IS the story, is wonderfully portrayed. I took much more from it than from the flashy Avatar, but it's all down to what floats your boat I guess.
I also liked the ambiguous ending. It's your call really. Heartily