I was blown away by the animation, but it has some problems. My enthusiasm started off extremely high but began to wane as deficiencies started to become more apparent as the episodes progressed.
The animation is just lush. Luxurious. It brings to mind the old Fleischer Brothers cartoons from the 1930s. It feels like a living world. I'm not a fan of most popular modern animation styles, but this is something different and special. If I were rating this on animation alone, it would be a solid 10/10.
The story, on the other hand, seems to be the same old tropes and themes that we've all seen a million times before. It's not bad, it's just not very original and is clearly targeted at a YA audience. YA can be mature but it can also be a bit juvenile, and this is the latter.
Where this project really falls apart for me is in the music. It's just wretched. It starts poorly with the theme song from Imagine Dragons, to my ears an unimaginably awful band, and it just gets worse from there. Much, much worse. If you're not a fan of that type of music, and I'm most definitely not, then you're in for a very rough ride where that's concerned.
Overall, 7 out of 10, mostly due to the amazing animation.