So this movie has received pretty bad reviews. I actually got a chance to see it. I really hesitate to say it's good. It's watchable, but to be honest I wouldn't pay to see it. Especially if you're a fan of the anime. The changes they made to the Airbender universe are just like
A few notable errors:
Name pronounciation - Sokka, Aang, and Iro are not pronounced the way they are in the movie. >_<
Fire bending - in the movie they made it so that fire benders had to have fire around to bend. Well, if that was the case, they'd never have risen to power, since the other three elements can easily trump fire. Air can blow it out, water can put it out, and earth can deny it the oxygen it needs to keep burning.
The earthbenders - they were on a boat in the anime. In the movie, they put them in a place surrounded by earth. And yet, they wouldn't earth bend.
Sokka - he is not captain serious, which is what the movie makes it seem like.
I did like most of the special effects, though. And if you have never seen the anime, it's probably a decent movie, although some things won't make sense.