So you've decided to go see an action movie at a movie theater. However, due to unforeseen complications you've arrived 20 minutes late. As you rush into the theater you look at the screen to see a man, who you assume to be the main character, beating up a random stock enemy, but you don't know why. This is more or less the beginning of BUSTA!
Lots of manga start out like this, but the problem with BUSTA! is that it assumes you already have a pretty good idea of what's going on. A few hints about the backstory are dropped here and there, but for the most part the story can get pretty confusing.
Another confusing part of BUSTA! are it's character designs. They're done well enough, but a lot of them look similar. One moment where this really hurts it is when the main character fights an enemy who looks exactly like him. It was almost impossible for me to keep track of who was who.
The characters personalities were pretty stock type. The Shonen MC who lives to fight, his witty best friend who always teases him, etc. they're not portrayed as being cliche, but they're not really ground breaking either.
Story wise, BUSTA! ends far too quickly. Just as the plot is heating up, the story is over. It feels unsatisfying, and I get the feeling that the mangaka wanted to do a lot more with it.
Overall BUSTA! Was a quick read with great art. If you're on the fence about reading it, it's only 7 chapters so I'd say just go ahead and do it.