When I first watched this show.. I was thrown off about the animation at first. Slowly it started to grow on me, and although it's simply animated, it has a lot of motion and its easy to watch.
The characters were by far my favorite part. All the characters were very memorable and are so witty. I loved the professors and the whole set up. It's got a balance of simple humor and ridiculous violence. I wasn't sure how to feel about the show when I saw the first episode (had the same feelings about Superjail) but after getting into the show, I love all the characters and the way they interact together.
It is a hilarious show, and it'll really grow on you if given a chance.