Well, this is one of the most insane shows I've ever seen, the humour is similar to danshi koukousei no nichijou, cromartie high school and Gintama. The episodes are short but intense. This one is really random and I loved it.
It's a comedy, nothing else nothing more. If you wanna laught, this could be for you. The only way to describe it is random, you need to watch it to understand it... or watch the shows I named.
Art: insane. It can look like shit, it can look average, it can look detailed af or very serious. This show plays a lot with it and it really pays off.
Animation: the same as the art, changing all the time. It can have barely any movement or a very fluid punch to the face with all kinds of details and splashing blood all over the place.
Music: I loved every fking second, the OP is really catchy.
VA: despite bieng old, it has an amazing voice acting and a lot of the VAs are still working and they are pretty famous. You probably are going to recognize more than one.
Characters: I loved every fucking one of them, even the straight one. The principal is amazing!
Cons: the first episodes aren't that appealing, but they start to pick real fast, but near the end the enjoyment varied a lot from episode to episode.
So, if you like any of the shows I named or you liked comedy overrall, this one is a should watch. I recommend at least to give it a try until the main cast is assembled, the last one being the girl.