Now here's a movie that depends on technical achievement and cuteness to win over audiences. Take that as both compliment and criticism-- altough this is one of the prettiest movies ever made, it's clear that they didn't put nearly as much effort into the plot as they did with the animation. Case in point: The movie's climactic ending relies on the premise that the cuteness of a million tapdancing penguins can charm the human race into stopping Antarctic fishing. If you think I just spoiled the ending for you, don't worry, you won't watch Happy Feet for its story anyway.
You will want to watch it because it's beautiful and adorable. It's fun watching penguins sliding down icy slopes, diving off enormous cliffs, zooming through the water. A better story could have made Happy Feet memorable, but the charm and eye candy is enough for me to consider it enjoyable. :)
It seems not everyone was captivated by the movie's charms though. Some wacky American conservatives are calling Happy Feet "far left" liberal propaganda. Perhaps they see an echo of themselves in the humans that were exploiting and destroying the environment, and in the stubborn elder penguins that were distrustful of foreigners and afraid of change.