I received this as a gift - it was supposed to be compatible with my littel electric Sun Joe SPX200E power washer. It took me a little while to find the right adapter to make the end of the SunJOe wand fir the 1/4" connections, but it is available. Finally got to try it out today - it really exceeded my expectations. Moving the surface head along about a foot per second left the concrete fully clean. The thing is quiet, and my washer doesn't generate huge pressure, so I was really impressed by how such a wide swath was cleaned so quickly. I'm looking forward to using it on other surfaces, especially the swim deck on our dock.
Wish I would have bought this the last time I sealed my driveway. It did a great job and didn't leave streaks in the concrete like a wand does. After each section, I did have to use the wand with a 40 degree bit to rinse dirt and cleaner off the concrete. Even with doing that, it saved time.
This is my second surface cleaner I use for home and small jobs for family, it works very well for what it was designed for! Will be purchasing a third for a gift!