Art: Average. Only gripes are that it sometimes depicts him looking older than his actual age.
Plot: Generic. Your average isekai, nothing to see here.
Story: Bad. It keeps on jumping from one topic to another, some aren't even important, they make minor details seem major and vice versa, it has those "Hehe, interesting." and "NANI!?" moments when nothing particularly amazing is going on, author tries to make character look epic, just kinda comes off as cringe, pacing is bad, events are so random... unexpected? Despite everything that I'm listing, it's not terrible. Just disappointing.