I have been using these paintballs for a while and the only reason was because i thought they were very affordable. I played in my backyard with a friend almost a year ago and the shed is still stained. If they don't break they hurt like heck. It cannot be cleaned from most things including our shed and it left a rubber like substance that is stuck into the shed and the windows.
Overall i feel these paintballs are good for just playing in the backyard with a friend as long as they don't care about stains.