The story is almost like any other isekai, the main character (usually a NEET/Gamer) dies in some way, wakes up in a new world and already knows all about the world because of their previous life. Then somehow they go about getting OP because of that knowledge and then Bazinga! They are at a school with a bunch of cute girls. If I had to say one thing that set it apart, it would be that the main character is not actually the main character, but actually just is the main character as the title suggests. Because of this, it allows for a slightly different perspective from a "mob" character who just wants to live the life of a mob, but can't because they are the main character of the anime.
Aside from the story, nothing else in particular stuck out as exceptional or unpleasant, save for a few minutes of extremely cheesy lines or wholesome moments that are nice in hindsight but as you watch them you are doing a full body cringe. The animation/visuals at times can look slightly off, but it didn't bother me for the most part.
Overall, I gotta say enjoyment definitely carried my opinion, so you could basically just remove a point or two if you want to account for bias. It was definitely enjoyable for me because these types of isekais never get stale for me, but I know they do for most people. It definitely isn't for everyone because both isekais and ultra power fantasies are for some reason discouraged and down-rated on MAL even though people should already know they won't like it before watching it.
