This was one of my favourite mangas years ago, I remember I discovered this when I was in high school and I read it one day when I was skipping school. This was the first time I had really skipped intentionally and I felt some sense of freedom, the manga also had some sense like that at the beginning and I really like the 30 or so first chapters, with the hunting and stuff.
Now that I've read it completely, I'm honestly disappointed by a lot of things. I think the conflict against Sawada dragged on for way too long and the manga lost itself at some point. There was not much survivalism left, the characters were not bringing up their reason for suicide and growing any more and it was looping into drama after drama. It was very different from the beginning where they all figure out what do to, both for themselves and for survival. I think so far Sousei no Taiga is better but it's turning into a warfare manga too.
Also why does the author insist so much on including rape in his stories? I really don't think it's necessary or that he had to do it that much.