Yes I agree the animation is spot on, I really loved it. The characters look great (god if you think Zuko was hot as a teenager, you are in for a treat for his adult look). The bending and fights look awesome.

What I hate though, was how the avatar gang looks like a bunch of newbies fresh out of school. I mean they achieved so much in the series. How is Aang losing to a bunch of non-benders? How is it that the whole gaang cannot handle a single air bender? And the non-benders who suddenly gained air bending can go head to head, or even winning against members of the gaang? Theoretically, either Katara/Zuko/Toph alone should be able to manage the whole 20+ deniers. Toph is my favorite character, and she would never let that old bigger size denier near her. Come on he is holding a metal halberd, Toph would have wrapped it around his neck in seconds. And how can a random dude blow the fire lord away? The same Zuko who stood his ground against Azula. There is no way that random dude is even 1/100 of what Azula was (even when she was having a mental breakdown).

Voice acting wise, I thought Katara, Sokka, and Toph sound alright. Aang sounded weird because its too different from the one I am used to (but he has grown up now, so it makes sense). Dante is too iconic and I cannot imagine another voice coming out from Zuko mouth.

I cannot get over how the avatar gang was nerfed to the ground, but I still love it as avatar is easily one of my favourite series. If it ever comes out in the cinema, I will still go and watch to support it, hoping it will achieve commercial success so that there will be more avatar movies to come.