I'm all about taking the kids to the movies this summer, I guess.
I liked The Lion, the Witch and the Wardrobe, which we saw in a real movie theater right after it came out, but it didn't leave a lasting impression on me. When I've caught glimpses of it since then (one of the kids bought the DVD, so it's been viewed a few times), it seemed way too serious. So I wasn't all that excited about Prince Caspian. I enjoyed it, though.
Here's my take on the Chronicles of Narnia movies thus far: they're beautiful to look at, even stunning at times, and the action is exciting and intense (also strangely bloodless). I don't remember the books that well, but I suspect that what's getting glossed over in the movies is the thought processes of the characters as they make very important decisions. I also suspect that their choices and how they get there are the most important part of the stories, so maybe that's why the movies don't stick in my head.