It was, (seemed like), a masterpiece, the trailer and aesthetic from the anime is what pulled me in. I was so excited to read the Webtoon.
It sucked.

The premise was really good, with a tower that you have to climb and you have anything you want yada yada. It seems good, but it isn't.

(minor to kinda important spoilers)
It keeps you reading on and on, and people say it gets better on episode 500, (essentially chapter 500 on Webtoon). They're probably right, but getting through the torture of looking at such, (no offense), terrible art and anatomy, a horrible tedious story filled with filler, bland characters (not with common tropes sometimes, which i have to commend siu for), and the battle scenes although kinda good, are hideous compared to other Webtoons'. (sorry for that run-on sentence), I can't read it anymore. I just can't. The story doesn't progress from what i can see, and i waited at least 30 episodes from the announcement of the devil train, to even SEE the devil train by the protagonists. ALSO, I had to wait episodes, (a little less than 100 episodes), to see Rachel and Hazelnut, (im sorry i forgot his name), to even interact or be in PROXIMITY.

tl;dr; tog seems good, and if you are fine with slow pacing, and spending days just trying to get to season 3 or minor plot points, or if you're just generally a saint, then it is good for you
if you are a normal person, & don't have the time or patience just to read 500 episodes, then it is NOT for you