It's alright, it's a lot better than M.Night's movie version that was made ages ago. That being said, it still doesn't come close to the original animated version.
They've changed plenty, some for the good, but a lot for no reason.
A lot, just for convenience.
They've made things look really good with the CGI, the action, the scenery is all great. Omashu and the air temples look fantastic.
The casting's were good choices too.
Yet, I feel they've left out important details, changed key elements & even more importantly, made Appa & Momo who were integral to the team, more of an afterthought.
Mainly I just wanted to say that the Animated version was a masterpiece for a reason. And even though nobody wants carbon-copies, it's still important to say, "If it isn't broke, don't fix it."