Just incredible. The expressions depicted are like nothing I've ever seen. Especially when one of the characters is crying... I can't even describe how powerful the portrayal of those emotions is.
At first glance I thought the art style would be limiting, but I couldn't have been more wrong. I've never seen such beautiful style have so much nuance and detail. Ever frame is like a gorgeous painting. The writing was also extremely strong. I was surprised in every way possible during these first 3 episodes and I can't wait to see the rest of it.
Summed up in one word? Well, seeing as how I felt exactly this during the conclusion of episode 3, I'll say breathtaking.