Pretty good, the characters were enjoyable and the plot never felt predictable. No one felt like they had plot armor (for the most part), and the fights were entertaining. The negatives, though, is that it often employs the story tactic of showing everyone in danger before the MC shows up. Repeatedly. It gets tedious after awhile.
And a major complaint I have, unrelated to the manhwa but to Game of Scanlation is that despite being the group that did the majority of the manhwa's translation there was no consistency in the vocabulary. This is incredibly annoying when after 50+ chapters they suddenly start calling something/someone something entirely different. And it happened at least 3-4 times, if not more.