My review is up to vol. 11 ch.98
Story: 3
Even though the concept is interesting, the story is poor. After 98 chapters I can sum up for you the whole story. Thugs appear, kill some fodder, Kenshiro appears, omae wa mou shindeirou-nani, man explodes, blonde man who is the thugs' boss appears, Kenshiro does some Hokuto no ken, lots of blood, blonde man is dead. Add some family/brother issues and that's it. The only aspect which led me not to drop the anime immediately, but in the end proved to be insufficient, was the emotional deaths.
Art: 6
The art is detailed, but at some parts confusing. I am willing to excuse sloppy animation in old anime, but the same doesn't go for the manga. All the bad guys who belong at gangs have the same design and facial traits, which smells lazy.
Character: 6
Characters are nice, but not something outstanding. Kenshiro, his siblings and Rei are interesting and villains are memorable. Any female is completely useless and serves just for motivation for the men, something that bugs me. Any other character lacks basic motivation, goal and special character traits.
Enjoyment: 2
I cannot explain the reason, but the manga was unpleasant for me, to the point where I couldn't even finish it, much less reread or fanboy over it.
Overall: 3