Personally, I thought the animation was a bit poorly done. XD But that doesn't upset me much. Seeing Seph, Zack, and Cloud in all their animated goodness was enough for me.
Young!Cloud has the most amazing eyes. I fangirled.
It's so weird seeing them all in anime-style, but really, really awesome at the same time.
I'm also pleased that Hojo finally got some screentime. Ah, how I love the creepy mad scientist. :D
And I'm glad I didn't actually have to see Zack die. That would break my little heart.
Edit: Due to popular request, screencaps can be viewed here.