Irritating and poor quality
The cg animation is horribly raw and unfinished, the storyline is forced and the humor is cornier than Orville Redenbacher. Even the problem is stilted (Parents late arrival on Christmas eve, therefore Christmas is suddenly dumb and pointless). I stomached watching it one time hoping it would improve, but it only got worse and the conclusion was sadly lacking.
My advice, if you MUST let your children watch this movie, make sure you're in the other end of the house with earplugs and a blindfold.