The manga starts out on a fun, gritty, gory note and has everything you might need for a fun romp through an urban gangland: hot guys with big weapons, questionable morals, and a whole lot of over-powered Yakuza and bounty hunters who need killing.
The first half of the manga goes along smoothly, fleshes out the conflict and new characters it introduces, provides a motive for the protagonist, and actually builds an intriguing little world inside of its plot that really drew me in.
Then for whatever reason, the manga just shot off into the usual disappointing cliches. The conflict between Tennouren and Gabriella was something that I really liked through and through, but after awhile even that started to tank and drag itself under, too.
So, unless you're in mostly for the hot guys, which is one thing this manga doesn't disappoint with, I wouldn't really recommend getting too involved with this one. It's just one great build up that tanks into inevitable disappointment.
Mostly, the ending is just straight up awful.