I'm usually a huge fan of animated movies. However, I never really got in to the Ice Age franchise. I thought that the first one was pretty good. I thought that the second one could have easily been a straight to DVD sequel. I can't really put my finger on why. It actually bothers me that I don't like these more because like I said before, I tend to always love animated movies with these kinds of characters and humor. This one definitely fell in line with the others. I would say it was better than the second one though. Its watchable and if you are taking kids to see this they are pretty much guaranteed to love it.
I can't really say if I would recommend checking this out. I'm admittedly biased to not being that big of a fan of the franchise. I also saw this in 3D and it is definitely another one of those movies that isn't worth the extra money and what not because there wasn't remotely that big of a difference.