It is highly /a/ approved from what I've seen, and it is one of my favourite manga personally.
The art starts out a little quirky but in its own charming way, although after a while it does become more well refined and traditional in its own way as the series progresses, which is good but also starts to have some minor issues with sameface syndrome.
As a fighting Manga it is very good, and does a great job of hyping you up to both contenders in a fight leaving you rarely in a position where you're not second guessing who you think is going to win. The political intrigue between CEO's and general business deal adds a second battleground on which the fights extend but at the same time there is a lot of room for comfortable casual encounters and light comedy between the cast which provides an excellent counterplay with the bloodsoaked warfare.
Now get reading and avoid spoilers.