Used this with my Craftsman power washer and it was terrific. Cleaned years of moss and dirt off my patio and didn’t make a huge mess. Kept it all under the shell. My neighbor already wants to borrow it.
So much faster to clean concrete than using spray nozzle. Tougher jobs you have to go over a couple of times. I recommend using an extended wand so you don't have to bend over. I should have taken before and after photos but didn't think about it until after. Concrete pad toward bottom of the photo is the older slab when house was build and we added to it later so that is why two different colors.