I have not run an AFE disk mulcher but have demo'd the Diamond and own a diamond brush mower. You need to keep the flywheel spinning, the faster it is spinning, the less likely it is to sling pieces large enough to cover any distance. You also learn what direction is the danger zone and it's normally easy enough to work around hazards when you are able to direct the debris in a safe direction. But yea, it's not a tool to use around houses or people, but it's really productive.