Saw Avatar: Last Airbender. I liked it. Really awesome CG effects and good fight choreography. The story, however, seemed rushed, skipping to the next setting and always having some subtitle underneath telling me what place it was found it annoying. I know it was 1 season packed into a 1hr 40min, but I really wished the writers could have had a smoother transition with the story. It was so segmented, I felt I didn't get attached to anything.
I laughed at the part where there were like 6 earthbenders stomping madly in order to move a tiny stone. I mean it was unreasonably tiny. Also, why are they pronouncing the names wrong! Sokka was Soak-ka, Iroh was (short sound i)-roh. I was grinding my teeth everytime Katara said Aang with a "Uung". Sometimes I would just misheard her just saying "uuhhh...".
So overall, if you have seen Avatar on tv, you might nitpick several things and complain, but I urge you to see if you like. Don't see it hoping to be exact same as the tv-show, see it with a clean slate or like an alternate universe. Music was nice and the CG was terrific in my opinion.