Look at all those reviews below which are full of negativity and complain on how the adaptation story is too fast paced and that the art is bad.
Story side:
Well, I'll be fair here. The story adaptation is not that too much rushed. If you want to see some really rushed manga/webtoon adaptation, see Zhan Long, Overlord, and Doulu Dalu.
That said, this LMS adaptation is not that rushed, the story is upright close to the novel with only slight differences that's practically only flavor texts. Please don't say that the story is being "skipped", the correct term is "summarized". The reader of the adaptation will have around 80-90% content compared to novel readers and no major plot/content is skipped, so story-wise it's truly still acceptable.
For the art style side:
Those reviewers below complains that the art is mediocre, characters not like the depiction in the novel, and such.
Well, Although it's not the best ever, this adaptation is by far really well-made. I mean, see Doulu Dalu & Coiling Dragon/Panlong adaptation then I dare you to come back here and complain again. In case you still say that the art in this LMS adaptation is poor, then you people are being ungrateful bastards.
Look, it's in full-color, and unlike other adaptation where even old men have baby face, this one clearly show actual facial line that's rich in expression.
Someone actually complain that MC's depiction is different than what the novel depicted. Apparently he/she thought that MC is a big, muscular athlete.
Then on my understanding, MC is not depicted as big muscular guy at all in the novel, well duh, minor SPOILER alert the big muscular guys are his dojo mates... MC really was depicted as athletic and has stamina, but he never was depicted as big brawny guy. Although he does dojo training, it would not make him a big muscular guy with ripped-chest and visible bicep. He is clearly depicted as your average around 20yo korean gamer boy on appearance, and yeah the novel stated that he does not look handsome but also not ugly.
If you still complain that the art is ridiculous, I dare you again, go read Coiling Dragon adaptation. Now that's what I'd call "bad art style" that miss the novel depiction by a huge margin which will make fans cry when they see it. The artist of Coiling Dragon's adaptation is like a Stormtrooper and the artist of LMS adaptation is like a Boba Fett. Don't you even dare to put them on the same league.