Let me start off by saying - this is a great movie for kids. It's pretty fun, and isn't too boring. But if it is to be taken more seriously, there are definitely some issues.
If you ask me, the worst part about this movie was the characters.
Peter, the eldest son, played the part of a strong and brave parental figure. Although he had his problems with Edmund, deep down, he just cared about the safety of his siblings. That's it. He's the kind of character we've all seen a million times. Honestly, he was my least favorite of all the children because he was given so much screen time, despite being incredibly predictable and uninteresting.
Susan, the eldest daughter, was not given any kind of important characteristics, other than being "the smart one". She contributed nothing to the plot, and never really said anything interesting.
Edmund, the youngest son, was very unlikeable. Which would be totally fine, if he was just supposed to be an unlikeable character, but they started the movie by setting him up for a redemption ark. He was really only fun to watch at the beginning of the movie, and he never had any real character development. The happy ending that he got didn't really feel deserved.
Lucy, the youngest daughter, was by far the best character. She had a clear moral compass, and drove the story in the direction it was supposed to go in. However, even she felt pretty predictable most of the time.
The White Witch was interesting enough, and although she was a very simple and straightforward villain, she was enjoyable to watch. Aslan was not quite as enjoyable, as his character did not live up to the amazing reputation that the movie set up.
However, the actors all did a great job with what they were given, especially Georgie Henley, who played Lucy.
The plot was kind of annoying as well. I left with a lot of questions.
Why does all of Aslan's army immediately feel comfortable following Peter? And why do they trust Edmund? Why does Peter suddenly become experienced in the art of battle towards the end? How is it that the White Witch could forget the law that was written on the stone tablet, basically ensuring that Aslan could not die there? Why is Edmund suddenly absolved of all treacherous actions? Don't all the traitors belong to the White Witch? What was so absolutely essential about the four sons and daughters of Adam and Eve? It didn't look like they made that big of a difference on the battle as a whole. How did Aslan and the unfrozen warriors get from the White Witch's castle to the battlefield so quickly? Throughout the movie, the distance between the two seemed very large.
The cinematography, visual effects, and music were all very good. The costume design was just fine too, but I wondered if they might have gone a little too crazy with some of Tilda Swinton's looks.
In conclusion, watch it with your kids if you want, but it's not anything to write home about.