I think this is my favorite design, though I have shot it the least. It's very small so it easily fits in a pocket. Good for target, not for hunting anything larger than a crane fly.
I have no reason to hunt things, and so I've ended up with more important things to do than target shooting. I made one for shooting airsoft bb's in my room. I also made a catch box:
https://www.youtube.com/watch?v=P4BzYAhXHrwAlas, I live in a very paranoid neighborhood so I don't even take one on walks. I do take one out on nice lazy days in summer. It's really a cool/cheap hobby, and I encourage people to try it though!