Gorgeous animation. Fantastic decision to have character faces including lips be asymmetric. Superb job at matching lip movements to letters and spoken words. Being able to see the characters speak the letter P or M is awesome!
Story is good, but the general plot and plot twists are well worn and have been seen many times in other movies so no great leaps in story telling.
But the visuals...the visuals really excel, even the background art is detailed and full of little activities the casual watcher may miss. I had to rewind and rewatch several scenes just to look at what was happening in the background.
Can't wait for episodes 4,5 and 6.