Kind of entertaining, but generic and quite badly written shounen manhwa.
Right now, I'm at the 105th chapters and the story didn't progress at all. So far, it's been a succession of battle, training, battle, training, with the MC fainting after each fight, and some feel good/bad and nakama-esque moment in between. So I guess it's a generic shounen formula.
There's also the baddies with their evil (?) and secret plan that keeps smiling creepily, the serious-face moment when the MC and/or his allies decide to take things seriously (and they all look the same when that happens) or the unlock-new-power moment that always ends up withe the MC fainting. There's some romance and pretty quickly too, which was surprising. And it's badly written, with numerous moment where it's only possible to think "Why would you do that?"
The story takes place in a tower, with multiple floors, and after 100 chapters, I don't know where the characters are. It's above the second floor but where exactly, I wouldn't be all to tell it. In fact, I don't even know how a character is supposed to go to a superior floor. There's also a rank but it's only used for the secondary characters and I still don't know how someone can obtain one, or what could be position of the main characters in that ranking.
Then, there's the pacing. Everything is slow. Maybe that comes from me because I want a spatial progression to accompany the internal evolution of the MC. But after 100 chapters, there's been only 3 or 4 different important locations shown, with the occasional adjacent points of interest.
In a manga, there are arcs, right? You go from one to another, and that's how the story progresses. But here, it's a bit confusing, because it's like the author doesn't know what to tell. There are "arcs", or rather training arcs, but it's hard to know where the story is supposed to lead us, except to the top of the tower.
So, yeah. Not bad. But pretty basic. You can appreciate the fights for what they are, although they are a bit formulaic and repetitive, the characters are endearing albeit quite simple. And that's it.