I just finished watching the movie, and I must say that they did the book justice.  There were a few things that went out of order, or just didn’t happen in the book, that did not change the overall story, and added some real meat to the plot.  The acting was done quite well by the humans, and the CGI was done pretty well too.
The ending was too quick, in that they didn’t give us a whole lot of time to figure out that the kids had been in Narnia for well over a decade before they came back through the wardrobe looking as if they had just entered it.
The great thing about seeing the movie just after reading the book, is that I could see the entire story relived right in front of my eyes.  I could tell just where there were changes made, and I could also tell when they were saying lines directly from the book, which happened often.
I really enjoyed it, but I’m glad I didn’t take Alaina to see it, because the battle scene at the end may be a little too violent for a 5 year old girl.
Let me know what you thought of the movie compared to the book.