The quick way to find out if you're gonna like the series is to watch the first ep. of the anime, but to summarize in a few points and disclaimers:
You might like it, if:
- you like shounen series that get dark, quickly, but don't dwell on it for long
- you like a bit of dark comedy and body horror
- look for a story where the MC isn't the typical resolute and optimistic moralist, but has a much more stoic, yet empathetic... "lawful neutral" feel in DnD terms
- you like stories with ambiguous allegiances (thanks to one character in particular).
You might dislike, if:
- you don't like toilet humour and crude jokes
- you don't like characters which are supposed to be charmingly stupid (most of the cast)
- if you've read too many shounen series to care about another "collect the things and defeat the bad person" story
- if you're looking something with a deeper story than your average shounen. The darker parts of the story are still just entertainment and not "food for thought." At least in my opinion.