Solo Leveling is a really great Webtoon, if you want to just have fun. It's beautiful, the pacing is well done, and overall it's just a great time. That being said, if you're looking for anything more out of this than a good time, I would look somewhere else.

Art - 10

The art is really top notch. It probably has the best art of any webtoon I've read and is up there with the best manga art-wise. It definitely wouldn't lose to Berserk, Vagabond, or One-Punch Man if compared side-by-side. The action is well set and movements have some serious weight to them. The double-page spread equivalents are a treat to the eyes and always look epic.

The only weakness I would say is the character design though I wouldn't say that it's due to the art and more due to the world just being relatively unimaginative. The execution is 10/10 so I can't really complain.

Story - 5

The story is kind of just painfully mediocre. If not for the excellent pacing, it would have been a 3/10. To start with the good stuff.

The pacing is really good. This story is a real page-turner and you'll be hooked from the first page. There are some light hearted moments inbetween the nearly non-stop action which gives a nice break to the reader as it builds anticipation to the next epic fight scene.

The plot structure is a good time but it's honestly kind of trashy. The plot is essentially this. Some people lose while near the MC, the MC is strong so he swoops in and saves the day, the side characters look in disbelief (while the women look aroused, don't forget this is a power fantasy), and then the side characters talk about how strong the MC is. In between the MC fighting for the side characters, we get solid moments of him training on his own and leveling up.

The plot itself is fine if not generic. Without too many spoilers, it's an implied "good" vs "evil" plot which isn't bad on its own but the execution is just... eh. Good vs Evil can work out really well like in the Lord of the Rings if it has good characters and serious heartfelt moments. It's just too bad that these moments are essentially non-existent in Solo-Leveling. For example, I love Gurenn Lagann to pieces but its story is kind of dumb too. The self-awareness and the heart of the story is just so great that I can't help but get into it. Solo Leveling's story has no heart and feels almost manufactured to appeal to young men who are into power-fantasies.

The world is really the weakest part of this story as it's so abundantly clear that the writer didn't think about the history of the world, at all. There are just so many questions. Why is everyone using Medieval European equipment (aside from the katanas, lol)? Who makes the equipment? Why do people care about the stuff in the dungeons if there are little traces of this affecting the everyday lives of the people outside?? What are the implications of literal human natural disasters existing and why do they bend to the government's will? There are just so many conveniences in the world so that it fits a generic MMORPG world that it drags the story down.

Another big issue is that it's not particularly clear why people care about dungeons in the first place and why it became an industry a la capitalism. We mostly see it as a point of serious human suffering so it's unclear why people are trying to exploit it for unclear profit. Given what we know about the world, it makes more sense for a dungeon to be a government's/military's problem rather than the free-market's problem. Had there been technology that could only be gained through exploiting dungeons, that would make more sense, though we see none of that in the world of Solo-Leveling.

Character - 3

The characters in this story are pretty tropey and flat. The MC is more interesting in the beginning but gets more flat the more powerful he gets. The other characters don't really have personalities aside from how surprised they are at the MC being strong.

All the characters are there in service to the MC in some way or form. The weakest characters are the female characters as they exist to pretty much just get horny at the MC for being strong. The male characters are not much better, mind you, as they're either there to be surprised, scared, or be an obstacle. I honestly can't really remember who the characters are except for the MC, Jin Woo, if that's anything to measure by and I read everything just a couple weeks ago.

Ironically the best characters are the MC's subordinates. Without too many spoilers, they aren't really characters per se so their characterization is more through the art itself. It's just a little ironic that characters that can't speak have more range than every other character, including the MC.

Enjoyment - 9

It's a good time and I would definitely read it again. It's trash though. I get similar enjoyment from it I would from John Wick or Pacific Rim. Stylish and fun but shallow. I would best describe it as a trashy Isekai that cut off the fat and focused on the parts people care about.

Overall - 6

Again, this is a good time but I can't really say it's particularly any good. I would wholeheartedly recommend it to someone but I'm not going to really remember anything specific about it a month or two after I'm done reading it.

In short, read it, just don't really think too hard about it and you'll have a good time.