I haven’t seen one up close and in real life yet, either. It amazes me that it can kill just the weeds in 2 acres in 1 hour! That is a goodly speed. Just the weeds!! I have spent hours and hours weeding small plots of land to get the crappy weeds. And then, been disappointed because if you don’t get the root, you’ve failed and they grow back really quickly. Even scuffle hoes, although they make it faster, means the weeds are back in a week. This looks like it kills them very well and permanently.