Now that the obligatory numbers are out of the way lets get to the interesting part so that the people who actually had the patience to read this dumb review get something out of it.
The anime, while otherwise being very standard has two themes that it explores very often. First is the act of using a persona. No not the magical djinn like psychic beings from Shin Megami Tensei, persona as in the fake role people play in society. The main character is an utter wimp in real life. But in another world, he practically roleplays as the cocky "Demon Lord". Even though in his head he's completely incapable of functional communication. The elf girl is a busty, airhead who's cheerful all the time. While in reality she's a busty airhead who acts cheerful for the most part to forget her troubles. Meanwhile the cat girl hides a dark and mysterious past and blah blah blah. This is true for all the villains, the main support characters, and governor, a wannabe god priest etc etc. They all maintain a persona of some sorts. By the end of the show everyone's persona cracks. And through that they all become a better person, or in the case of villains they make everyone's life better by being gone.
The second theme, as anyone with 3000 IQ would guess, is slavery. In this series slavery is more akin to what it was during the Golden Age in our world. Slaves aren't treated badly by most but are still considered a second class citizen. However like it was in real life, multiple characters are shown to be better off as slaves. The series ends with two girls convincing a per-pubecent girl the fun things about being a slave. That really creeped me out. And that's the show. Everything else is like every other Isekai anime you've seen.
