Oyasumi Punpun is a great manga, however the manga have some issues that can bother manny people. And in this review i'll try show you these issues if you are looking for things that can bother you in the reading please look this review.

Story-9
The story is about the life of Onodera Punpun since his 11 for his twenties and we see the boy growing with manny MANNY troubles with sad, depressed and astonish moments in the narrative.
The story have much dialogue what get the things a bit boring in some chapters if you are the kind of person whose don't like read very much it may annoy you, beside these issuens the story is GREAT the author makes you feel like Punpun in moments of depression and despair. Since the beginning the narrative is very realistic and don't saves resources of story-telling like sex or death if you are weak mind and easily disturbed please stay away if you don't mind for this juste enjoy and learn some life lessons.

Art-10
Combining with the story the art in this manga is wonderful and realistic, the city, the people and even Punpun(who have the simplest design in most part of story) are very well represented and some moments the art is surrealistics but its works perfectly.

Characters-8
The characters are very meh, Punpun is extremely well developed, but the others are simpler and do not have a GOOD time screen than it. Some characters look useless, they do not interest anyone and they do not develop the story, if those rotten apples do not show up most of the time, the manga could be so much better.

Enjoyment-9
The manga is very good you can appreciate every chapter. Even with some boring moments the art compensate(try find Punpun in random places ^^)

Overall-9
The manga is amazing and if you like depressing and more mature stories and still didn't read this manga stop what you are doing and go read. The manga is a good experience and you could even learn some things with that and think about your life.