I just finished this book. Overall, it was incredibly poetic. Some of the best prose I've ever read with more quotable lines than I can count. BUT... it does require a lot of patience. Even as someone who is used to slower paced novels, I struggled a bit during some pages with the sheer amount of tangential description. These would then be contrasted with, what seemed to me, really abrupt and out-of-place action sequences. But maybe I should've just been more prepared for these.
Aside from that, I still consider this a 4 star book at the minimum. I really love books that delve deep into the psychology of flawed characters, particularly how their upbringing played into it, and this one knocked that out of the ballpark. But I do kinda wish we got some more from Hazel and what her motivations are for sticking with these two as long as she did.