Ok, so this show might just as well be called „Tonal Issues the Anime!”. I still liked it very much though. It takes an interesting spin on the isekai genre, has good (albeit sometimes a little childish) comedy elements in it and most importantly it features a quite likable protagonist and side characters.
First - the story.
As I mentioned the story has ‘some’ tonal issues. The show can take You from a child dying in flames in a war-ravaged village to a joke about being a virgin to another (violent) death and then to another joke about destroying porn in a span of a single episode. To put it mildly: it can be jarring sometimes. I have a feeling that the author wasn’t sure what audience to pick since some themes of the story feel ok for a kids show and some appear pretty mature.
Having said that the plot is very decent for an isekai show. The story revolves around the everyday lives of characters and solving (very simple) economical/logistical/philosophical problems which I like very much. It’s just little adventures of the main protagonist and his friends. Similar to the slice of life anime the series is more about the characters than the plot itself.
I also have to mention that (obviously) the job and um … the race of the protagonist is quite different from other isekai shows. The series handles this very well: being a slime gives the protagonist many advantages and he uses them in clever and unexpected ways.
The comedy elements of the show are pretty good and while they won’t have you rolling on the floor laughing I’m pretty sure they’ll get at least a smile from most people.
Second: the animation.
The animation is decent but not much more. I found it much better in the first episode than the later ones but it might just be my taste.
The character design is generic and it's supposed to be that way. As with Konosuba or Goblin Slayer, the whole point of the show is to take a generic feeling world full of tropes known to the audience and provide a fresh spin on it.
Third: the sound.
The sound is ok. The music is bright, light and forgettable and the OP is decent but nothing more. My only complaint is that the show should have stayed with the original voice actor of the protagonist - I liked him much more than the one used in the later episodes.
Fourth: the characters.
The main character sells this show. He’s likable, witty, kind of shy and capable. Since the plot of the series is centered around his adventures and everyday life, he has some time to be fleshed out as a character. His motivation for having those adventures is a little thin, but it is there and since the show is very light-hearted I’ll let it slide. While he is overpowered (why this trope again isekai, why??) the plot forces him to use his wits rather than brute strength which is fun to watch.
The side characters are quite likable but not very fleshed out (apart from one which I do not want to spoil to You). The plot sets up their goals and motivations for working with the protagonist pretty well.
Verdict: It's a lighthearted comedy about a guy turned into a slime. You may take it or leave it, but I think it’s worth checking the first three or four episodes.