This was quite obviously one of the best sci-fi fantasy mangas ever, although the fact that it's mostly oneshot may turn people off.
There are continuing storylines scattered here and there, such as the leon arc which takes several, several volumes to complete, and it's not until that last volume that you realize the previous volumes were even part of it in the first place. 😛
It's very annoying to people that don't like oneshots. Most storylines will resolve in one chapter(I guess ~30-40 pages), and each and everyone of them are bold, new, and refreshing. The bad guy could actually be a good guy, the good guy is actually the bad guy, girls fall for bolt, bolt says at most ten words a chapter, yadayadayada. IT's really better than it sounds.
The WORSE thing about this manga is that some characters pop up in later chapters that was from like eight volumes ago, and being that this is mostly a story of seemingly oneshots, you probably won't remember that character. I count at least two characters that were part of a general "cast" in the last two/three volumes that I don't even know the names of. It doesn't really matter, but it really ticks you off. There's very few(if any) sites on the internet collecting the information about the characters, so it'll be hard to understand who they are without actually going back and reread the entire series.
Action is amazing, and the plotlines are always cool. The art is very nice, although you never see Bolt's eyes in the later volumes(you'll always see those glasses). Every now and then, there'll be a pretty cool plot involving bolt's past. ALL characters, even the "bolt" girl that appears for the sake of the chapter, have a personality, so you won't be dissapointed. The first two volumes aren't truly that seductive, but by the time you get to volume 6, I know you'll finish it up.
Check it out, it's an amazing, EPIC read, especially that ending. Unfortunately, the readers never TRULY understand who bolt is, even with all the hints. The last chapter gives a pretty cool idea, though.