On GR, I gave it 4 stars because I love Mercy's world but in reality, 3 stars because it's disappointing in art & storytelling. The art is uneven with Mercy looking like a brunette Barbie in one scene & more muscular (less boobs) in the next.
I found a lack of continuity from the series, which was disappointing especially given that PB is list as an author. Also, I‘m not sure this would be enjoyable if you weren‘t familiar with the series.