This was a very enjoyable film; maybe not as exciting and a bit more contrived than I'd been looking forward to, but it was still very enjoyable in the main.
But one thing stood out above any other in this film; and that was: Paul Bettany's performance as Dustfinger.
He was just brilliant, and absolutely stole the film for me. I thought he was a good actor anyway, but the moment he came on I had to stop and think "wow!", and I continued to be impressed throughout the film, as his character development just got more and more interesting. I felt far more sympathy with his character than Brendan Frasers (even though I think he's fantastic!), and I felt that he was the true 'main character' of the film (in the same way as Sam is to Lord of the Rings).
If anyone is unsure about seeing Inkheart, I would suggest that it is a must-see if only for Paul Bettany's absolutely stunning performance; he is intense, emotional, funny, troubled, heroic and just plain brilliant.
Also high praise for Helen Mirren and Jim Broadbent, who were very refreshing. I did feel more could have been done with Andy Serkis and Brendan Fraser, they didn't wow me as much as I'd expected.
But overall a very enjoyable film!!