Let me preface this by saying: my scoring is quite generous, where 7 is considered something decent and worthwhile.
TL;DR
-art (10): absolutely marvelous
-characters (6): alright characters, but not particularly deep
-story (7): pretty good, but doesn't seem to have a direction
-enjoyment (8): would recommend
-overall (8): definitely not perfect, but still good

Many people have said that Solo Leveling is not the average fantasy with an OP MC, but story-wise, I'm going to have to disagree. That being said, it's still a good read, and I would recommend it to anyone who likes action and fantasy comics.

What Solo Leveling has going for it is ridiculously good art and likable characters. To put it simply, the art is fantastic; not only is the actual art gorgeous, but the panel composition and layout also draws the reader in. The characters are likable, but as of now, the only character we extensively know about is Sung Jin-Woo, the overpowered protagonist. Of course, it's fun to see the underdog slay monsters and level up, but Sung Jin-Woo doesn't seem to have an end goal for all the stuff he's doing, making him a somewhat flat character. He is surrounded by members of the supporting cast, which we know basically nothing about since this is "Solo Leveling," focusing only on Sung Jin-Woo thus far, but based on the information given, they're fairly interesting and likable.

The main problem I personally have with Solo Leveling is the story, which at time of writing (Ch 106; end of Jeju Island Arc), doesn't seem to have a direction. So far it's only a decent "zero-to-hero" story despite what many fans proclaim. Sung Jin-Woo tirelessly fights monsters to level up, but what for? Even if grows without direction, I still enjoy it, but I can't help but feel that there is so much more potential to the story that goes unexplored. I have heard from light novel readers that the plot starts progressing and getting better with the latest arc, but being a manhwa only reader, I unfortunately cannot confirm that statement.

In the end, Solo Leveling is definitely a fun read, but I worry that if you come in expecting a nigh perfect comic that reinvents the action fantasy genre, you'll be a little disappointed. Don't think too much, and I bet you'll have a fun time.