This worked well on my townhouse brickwork, driveway, and patio. Allowed me to cover a large area. It does throw some water so be sure to wear rubber boots or shoes that you don't mind getting wet.
Tried it on a small portion of the deck. Had to hold it down with some force. It did a pretty good job but ended up not using it for the rest. Going after the driveway next and will try it again.
I like this attachment except expect to get really dirty when using it. It flips up and sprays the dirt all over you. Wear safety goggles. BUT I cleaned two driveway walls, one without this and one with this. It took an hour for one wall, 10 minutes with this attachment! Well worth getting dirty! It did a better job on a cement patio than just the power washer alone.
The Sun Joe Surface, Deck & Patio Cleaning Attachment for SPX pressure washer came at a great price, was easy to assemble and cleans very effectively. However, I did not rate it as "Excellent" because it does not draw soap from the washer. All it does is scrub with water jets. If you need soap you must first use the soap jet attachment and spray the surface to be cleaned then put the cleaning attachment back on. For large jobs you will have to do this multiple times. It would be much better product if it would draw soap from the washer as you used it.