The movie bets more on impressive special effects than on a scenario well tied together. (metacritic.com)
Poulter («Son of Rambow») surprisingly steals the movie out from under its sporadically impressive special effects with his arching eyebrows and a grating voice that miraculously makes him the film's most endearing character. (colesmithey.com)
The animation is top - notch with plenty of impressive special effects, but first time solo director Tom McGrath (who previously cut his teeth co-helming the Madagascar franchise), struggles a little under the weight of such an ambitious venture. (screenpicks.com)