I was not expecting this kind of manga to have such a firm grasp on its world and characters, not to mention showing a broad knowledge of many things in enough depth you at least believe the author knows everything they're writing about.
The art is nice, and the world building is fantastic. The two main characters feel like they're real people, and their relationship as friends who aren't afraid to poke fun at each other—which feels genuine and is good fun—becomes something special when they often team up to poke fun at other people and things.
They aren't together—at least not yet in chapter 33—but I think they're the first characters I've truly shipped since Ichigo/Senna or Ichigo/Tatsuki back when Bleach was still in serialization. It's weird to feel this way again after over a decade, but good weird.
The political parties feel real enough, and no one country or leader feels like they're too stupid to be in the position they're in. The who and how of each government official, regardless of nation, do things in ways that feel plausible in real life.
Dungeon management and the rules of the dungeon have been thoroughly thought through and make sense, and there's plenty of intrigue to be dug into, bleeding into the plot effortlessly.
There are some issues where something done didn't make sense, but those are inconsequential to the story and only feel like an occasional minor nuisance. There's also the issue that some of the recurring side characters aren't as fleshed out as everything else is, but it's not a big deal.
This story is more of a slice of life than an action or adventure, so it can be a bit slow, but I wouldn't change that, personally.
Overall, I highly recommend this one.