The one we had I had as a kid would put a hole in the side of a coke can at 25 yards, as long as you could hit it. We used pea gravel as ammo most of the time as it was free. Glass marbles were also fun but that meant a trip to the dollar store and spending spending money we usually didn't have.
I want to buy one but the quality of what is cheap and on the shelf is not worth spending money on. I am not spending $60 on a toy slingshot, and I don't have anywhere safe to shoot a higher power slingshot.