Disclaimer: I read the mangas, years and years ago
Story-wise.
All I can say is that, I would like to see these casts in a series. It was just too short for me who read all the manga, even up to Angel Hearts. But the blend of one part of the full storyline with the other part as it creates a cohesive story is quite nicely done. 90/100
Characters.
They portrayed the characters with almost perfect scores. The costumes, cars, apartment, even Ryo's way of standing, the way he moves and all of his quirky anecdotes are very much displayed there. Kaori's and Saeko's characters also almost fully fleshed out as well. Can't be too perfect though since we can't have a 200t hammer swinging all around every time, but the denim jacket is spot on for Kaori. Attention to details are 98/100

Overall, I would recommend this to anyone that have interest in a funny action drama movie. Perhaps, similar to Jackie Chan's movies.