Surprisingly decent. MC is the usual bland OP Isekai protagonist, but there is an appeal in seeing him travel to various places and solve problems. His OP-ness actually matters as well, because the dangerous events that happen require that level of power and it's interesting to see how he handles the crisis and unravels the mystery behind the events. There are also hints from the priest that he was intentionally summoned to deal with the problems, which makes his powers feel less random.
If there is something that imo can improve the story, it's to change the protagonist into a self-aware OP god/hero that actively wants to save the world (basically just give him an actual strong personal motivations) instead of the generic self-insert Isekai protagonist we have. But then again, being a meaningless Isekai story is kind of the point, so...