This is an "I'm snowed in for 3 days and ran out of stuff to watch" movie. No plot. Just people (most of them annoying) standing in the same room talking for an hour and a half. Had there been a decent ending it wouldn't have sucked so bad, but it didn't. You just sit there waiting to find out the who, what, when, where, and whys, but you never do.
Nothing mind blowing. If you're expecting realistic animals and epic nature shots, you'll be disappointed (as I was). The CGI still looks fake. I saw it in 3D at the Imax, and it was nothing special. It's the closest to a realistic version of the story, but talking animals look fake either way. Also there were alot of parents with children walking out because of the violence. But I was mainly disappointed at how fake everything looked.