Story: (3/10)
Really slow and too much passive scene (discussion, talking, etc.). The ending was very bad. How could Milim play dead just for fun while destroying other people village? That doesn't make any sense.
Art: (5/10)
Average.
Sound: (7/10)
No different than other anime. I like cute kawaii sounds so I give it good rate.
Character: (4/10)
There isn't much character progress through the story. The Milim ending part is the worst part. Destruction just for play? And Rimuru okay with all that? I assume building town is easy in that world. But destruction in other Devil King's kingdom is insane.
Enjoyment: (4/10)
Decent. I enjoyed some scene like the evolution of Rimuru becomes Devil King, and the rebirth of Veldora. But Veldora in human form is pretty disappointing and doesn't look as badass as Veldora's dragon form.
Overall: (5/10)
Mediocre anime. I might not continue when there's new season of this anime.