Well, for my part, I already read the webnovel (I had to, since I get super anxious about a story turning out badly somehow whenever I get too invested in a manhwa like this, to the point of needing to spoil myself to be able to enjoy it in peace Σ(︶▽︶;) ). And, without giving too much away, I can say there are some mind-blowing passages still coming up, and it's certainly not about to lose its pace at any point (^ᴗ^)
And (*obsessive preordering fan here* ^^') I can very much recommend the solid copies. They're nicely done, a bit larger than classic manga volumes, with good color print quality. Though objectively speaking, I personally think it does lose a bit of its dynamic feel by the panels being arranged more like a traditional comic instead of its original webtoon form, but it's just a different feeling being able to actually physically hold it in your hand (and, you know, admire Jin-Woo in all his glory in physical print ;) ). And the volumes are pretty long. I was pleasantly surprised that volume 3 actually gets all the way to the first half of (my much beloved) chapter 45 (where he becomes the Shadow Monarch) already :D
This story is so good I've already read it twice. I swear I'll read it again! I can't get enough.