8.5 stars rounded up, the only reasons this isn't a solid 10 stars is there are a lot of little things that bothered me in of plot and relationship dynamics , but the rest of the series was lovely so it's ok.

I honestly don’t want to share too much about this series before you look it — it’s best enjoyed knowing as little about it as possible. However, what I will say is the pacing is good, the jumpy timeline builds tension and has you at the edge of your seat, and that ending…Bitter and sweet. How you feel about it may determine your final rating too.
But yeah, apart from that...
It was a unique story but there was a missed opportunity to really make this an the best story, which somehow makes the flaws worse since I get frustrated seeing wasted opportunities.