Awesome, just awesome.
It lived up to the hype and more. I can not ask for a more perfect ending, The fighting was awesome, Sokka's role was epic, Zuko vs Azula was great and had perfect music, and spirit bending was brilliant. Plus the part where the fire crew gathered for the party had me on the floor.
Only one thing bothers me and that was that we never got an Iroh back story.
Otherwise perfect.
Just awesome.