This manga had so much potential, in my opinion. The main character was funny and seemed like a pretty cool guy, though he's pretty over-powered. The supporting characters didn't get fleshed out much, but seemed interesting as well. The setting is huge, so much that could have been used for further arcs. But, it just ended.
However, my main problem with this manga is something I can't say because it's a major spoiler. Which annoys me, because I wish I'd known in advance so that I could have prepared for it or maybe even avoid this manga altogether. Even though I started it knowing it
was complete at only 17 chapters, I don't feel that can excuse this issue. And I can't even tell you what it is. So, instead, I'll say this: don't waste your time on this manga, it'll get your hopes up only to leave you feeling frustrated and disappointed.