It was slow for the first 70 pages or so. (3 stars) Then it picked up speed, reaching 4 stars by halfway through. The last 100 pages or so were 5-star quality. I would've given it a 4.5 star average if it weren't for the ending, which felt kinda deep and meaningful... but kinda unresolved as well. So it became 4 stars.
It's still an excellent book that I would definitely recommend, with heart-wrenching observations about humans and existence, and fascinating, dynamic characters. I feel like I came away with new knowledge, and new ideas to consider. The writing was odd, but about 1/3 of the way through, I really got into it. There were a few grammatical errors that at first really ticked me off, but after a while, it just enhanced the protagonist's voice, giving her this touch of youth that I found really beautiful.
Overall, this was an excellent book. Don't read it if you want a faster, more action-packed pace though.