Actually, the pull back into Narnia sequence is really well-done (see comment above about how good the effects are). They actually don't bring up the Penvensies until about 20 minutes in - after they do all sorts of scenes establishing the Prince, his quest, his evil uncle, etc. Then there's a chase, then the horn. The beginning was actually really exciting, dark, and promising. They sort of lost me towards the middle/end.