First glimpses had me thinking of Avatar, but when the fighting starts, damn, it really transforms! :D I wish the animation clarity was a bit more sometimes, certain characters seem to be out of focus intentionally in the fights, but the detail level otherwise is impressive... and the backgrounds! Really thorough work with everything there.
I wouldn't mind seeing more of this... seems like a concept with a lot of promise! The character design's pretty unique too. Like traditional anime but... with a twist.