You know, I'm pretty shocked this manga has received such blatantly positive reviews on this site (excepting, of course, the one below mine, which doesn't actually make any sense at all no matter how you look at it). Kimi no Knife isn't a bad manga. It just isn't a really good one, either.
I mean, yeah, it's an okay manga. As in, it's really nothing special, but if you're looking for something to pass the time with, I guess you could pick it up. It's somewhat like Death Note only slightly less contrived and with characters that actually feel (for the most part) relatively human. Unfortunately, the appeal of the series - namely, the psychological and moral aspects that were so prevalent in the beginning - has been significantly downplayed in favor of... what? More action and murder and blowing stuff up? That really is unfortunate, since the psychology behind the premise was what initially drew my attention to this series. I was hoping for something like “Death Note, only with a writer who actually knows what the hell they’re writing about,” but I guess that was too much to ask. I mean, I was anticipating more mature storytelling from a seinen title, as I've come to expect of the genre. If I wanted to read a flimsy action series without having to actually think, I’d have picked up a Shounen Jump title. As it is, it's become increasingly difficult to find good seinen manga, especially with all that ecchi crap that’s out there nowadays.
Anyway, I agree with what one reviewer said about that Ito chick. What a boring, senseless character.
Honestly, I’m glad she died. At least she did something useful for once by saving a child before she went.
Speaking of annoying, what the hell is up with the Shiki's Dulcinea complex? Geez, it'd make a hell of a lot more sense if he had a Quixote complex to match, being a reluctant hitman and all. Makihara is by far the most developed character, what with all his muddled emotions and his motivations and that Stockholm syndrome he's developed. Itsuki is okay, but I wish her power had more influence on the story because right now, it really just feels like an all too convenient plot device. Speaking of which, the plot is okay, not nearly as deep as I'd originally hoped. It gets pretty repetitive after awhile with the whole "get target, debate killing target, kill target" setup. The premise isn't exactly original, and the author isn't trying too hard to make it that way.
I'm going to give this manga a 5 because it doesn't deserve higher than what it is - average. Hell, a 5 is doing it a favor, really. Maybe I'll finish it, maybe I won't. That'll depend on how much longer it can hold my interest (which has been waning lately).
Also, concerning jasperv's ETA, which is just annoying me: 1. Women can be sexist, too. 2. The reviewer DID mention the author's sex in her post. Multiple times, at that. 3. She also made a point of explaining how the manga is anti-male. I'm going to take a wild guess and assume you saw the word "feminist" and flipped the lid without actually reading her review. Calling her carefully written argument BS isn't exactly doing yours any favors.