This is basically imitation Tarantino. So, if you like that kind of thing, you might want to sit through this.
There are, in fact, a couple of laugh-out-loud moments that arise from very dark situations. But, otherwise, very slow moving - lots of filler because he doesn't have enough story to fill two hours - and no strong links to reality. This is allegory all the way, although I'm not sure what the point of it might be.
One difference from Tarantino: the main character does feel an acute sense of remorse and that becomes a major thread near the end.
Recommended only if you're intensely interested in modern cinema from Japan.