It feels bad to say this since it's spreading the name of the novel but the manhwa is just mediocre. It rushes through the story set by the novel at breakneck speed causing plot holes that were explained in the novel (like minjun's sister watching the program with the Americans in ch. 7). I'm also not sure why but someone(author,artist,editor pick one to blame) is changing the characters' physical and personality traits at random.
e.g.:
-Kaya is supposed to be much harsher and gave an impression of having an incurable case of RBF(resting bitch face) in most of the grand chef arc.
-Anderson should be more of a stoic, prideful personality(which makes sense because of his upbringing) but is forced to accompany minjun in a panicking visual gag ch.5?
-Marco is depicted with some timidness so I can't complain about that but if I'm not mistaken he's supposed to be quite overweight in the novel whereas he's relatively fit in the manhwa.
Maybe it's nitpicking but if they're willing to compromise a character's traits and the original novel's writing to draw things differently I'm not sure if they have their priorities straight making an adaptation of a novel.
Details about the story aside I don't know if anyone else is feeling it but I get lost trying to track the places the characters are in at any one time. It might be a side effect of them rushing through the story but the constant changing setpieces in the story makes it hard even for someone who's read the novel to tell where the characters are exactly.
All in all the novel deserves better imo but I'm biased since I actually like the novel so take this with a grain of salt.