Typically I prefer to preview a movie before my kids see it, but we were with another family who was really interested in seeing this film.
Overall it was a very enjoyable adventure/fantasy movie, though conceptually, even for an adult, the storyline was tricky to follow.
The acting was well-done and the special effects were outstanding, even if the film seemed to borrow greatly from Peter Jackson's work (including actor Andy Serkis who played Gollum).
Despite being somewhat predictable, I found it to be an entertaining ride and the story reminded me greatly of "The Neverending Story," to a point.
One word of caution for parents of younger kids, I was with two seven year olds and an eight year old. The younger ones hid their eyes from some of the scarier parts (per my suggestion) and the eight year old found some scenes to be very intense.
Overall, I'd give it a 6.5 out of 10. just my opinion, of course. ;)