Oh, sooo much text ahead. But honestly if I had read such a review before actually reading this Manga it would probably have saved me alot of time. So here goes:
The Manga starts out pretty interesting with a fallen demon who helps out sinners that were falsely accused of their sins, in order to gather their evil energy (called "Dark Matter") so he can become a real demon again.
The main character Kucabara starts interesting as well. He is kind hearted but has a perverted trait that shows from time to time in comments and statements that are just plain wrong and disturbing to surrounding characters. However the author completely drops that amusing attitude after a few chapters and focuses on his "kind heart". This however to an extent where Kucabara seems like a mental patient and is in fact a mayor danger for himself and others due to his sheer nativity and stupid actions resulting out of it. He decides things against any sort of logic or rational kind of thinking and becomes a completely implausible character. However there are certain situations where he turns out to be some sort of strategic mastermind (at least the writer wants to pass him off as one but the solutions aren't that impressive) so his character is kind of vague and depends on the situations. Not a sign of good writing in my opinion.
His little sidekick is called Bichula and is your typical stereotype of a Chibi-monster that is just SOOO cute that you can almost hear the fangirls squeaking. Personally I hate that sort of character design. Luckily his character is well written and has an interesting personality. As opposed to Kucabara he feels real and plausible. Additionally he has different character designs, so you don't have to bear with his chibiness all the time.
The third character that is worth mentioning is Idamaria. She is introduced as a nun who is also an exorcist and kills demons invading the human world. And, well what to say. I can't stand her. She is a fucking flagship-racist. She despises demons because of a tragic event in her past and therefore all demons are the same for her. Even Kucabara who always tries to please her, even though she treats him like shit (but after all she doesn't really mean that, being a not-so-well-written Tsundere and all ...). That's another reason why Kucabara just doesn't feel real while Bichula does. Kucabara puts up with the crap she gives him and knuckles under, while Bichula freely speaks up like any normal, not-mentally disordered person would do.
Overall a good bunch of characters you will meet are Tsundere as well. I lost count of how often I read "Don't misunderstand. I'm not doing this for your sake." or something along those lines. It gets old. Really fast. OF COURSE they just happen to be there and aren't helping the characters in need, but are only acting because of their own, selfish reasons. This is such a lame stereotype and I can't stand it.
They are good. Personally I like them. Characters that are supposed to be attractive pass as attractive, cute looks cute, creepy looks creepy and so on. Sounds basic? Well, I have seen butt ugly characters and the author seriously wanted me to think they were idolized by everyone because they are so beautiful. I think making the reader react to character-designs in a similar way than other manga-characters react to it is very important. And it works here.
The backgrounds are interesting and detailed. You can pretty much always tell what's going on and where the characters are.
One thing that bugs me however is the perspective on the faces. Sometimes, from a slightly sidewise view the eye that is closer to the reader is placed wrong. Like it was too deep inside the skull, where the brain should be. Just my sense for perfection here, but still ...
It's nothing new, really. Demons, sinners, hell and so on. But the author gets pretty creative regarding the design of the actual hells, so it's OK. The real letdown is the counterpart. It's Christianity. Nothing more, nothing less. Prayers, religious fanatics (Idamaria for example), the bible, crosses and all that stuff you know and yawn to. No creativity whatsoever. The author could have gone and created a completely new religion or organization!
Especially after a certain car or other devices are introduced it gets plain ridiculous. The words "science" and "christian" are actually used together! Can you believe that? "Christian science"?!? That's like sugarless sugar! That's why I think it would have been so much better to just come up with a new organization. Something that makes over-the-top ridiculous technology, that fails to make sense in the first place, at least halfway plausible.
But we have the well designed hells. They seem kinda weird here and there but overall interesting and exciting. Not just Fire and typical stuff but every higher ranked demon actually has his very own, little hell. Too bad we don't get to see that much about them because the author decides to scrap everything in the end which brings me to the next point:
As I stated at the beginning it starts pretty solid. But as a regular Manga-reader you know Kucabara won't save sinners all the time, until he finally is a demon again. There has to be some sort of story-development. And so it goes on and on, said story-development kicks in, new characters are introduced, none die because the writer doesn't have the balls to and we learn more about existing characters. You can't wait for Kucabara to become more badass and he has his moments, but overall he regresses to a mental vegetable. Bichula stays cool and real throughout the whole Manga. Idamaria stays a racist (honestly I think she worships Hitler more than Jesus) and tsundere pretty cozy as well.
The spontaneous, oh-so-well timed power-ups in situations where they are needed are too obvious for my taste. The characters don't struggle enough for them. They just sort of happen. And the day is saved because ... well, the author says so.
So the story develops further, stays interesting enough to keep you reading somehow but it's not mind blowing or out of the ordinary. But then! You can almost exactly tell when the author himself got fed up with his own story. Really, it seems like he got sick of it and scrapped it all! After a fifth, at chapter 83 to be exact, shit goes down. Hard!
One thing happens after another! Big final! Bigger final! Sudden twist! Bigger twist! Random power-up (really, totally, out-of-thin-air random)! Random explanations that fail to make sense in any way! Coincidences that are too good to be true! And what is this? A sudden attack of creativity regarding the good-bad-concept? All in the last 17 chapters!!! We were in the middle of exploring the world and suddenly everything takes the fastest highway to ~Fin~! I never experienced anything like this! Please bare with the exclamation marks but it's just like the author got tired of his own story somewhere around chapter 80, decided that the Manga would end at chapter 100 anyway and threw in EVERYTHING he had vaguely worked out at that point.
IT! IS! A! MESS!
Honestly. I would even say it would be better to just stop reading at chapter 82. Just pretend the Manga is left unfinished and figure out the rest by yourself.
I would have liked a fallen demon who kills sinners for him to become a full demon again better. Kucabara however helps them to do so, but I liked it nonetheless. Sadly the whole Manga doesn't have real peaks and just goes on like you expect it to. The ending sequence however is ridiculous. Somewhat it's EXACTLY what you thought it will be (to the point where you can tell what will happen on the next page without even reading it yet) but then it is such a mess, so random that you shake your head in disbelieve.
Overall it's so predictable that it can get as comforting as it can get boring. And at the same time it has so much asspulls on behalf of the author that it can get as irritating as it can get interesting (in a ridiculous way).
Me, I wouldn't sit through it again. There are way better Manga out there. (show less