I didn't realize that my sidewalks and driveway were dirty until I receieved a letter from my homeowners association telling me so. I didn't think that they were bad at all, but it didn't help that the guy that lived next door was a clean freak and washed his every other week. I just didn't have that dedication. My grandmother had one in her garage for about a year since my grandfather's passing and said I could use it. I had to replace a line that had broken down, but other than that it was perfect.
I started at the top of the driveway and worked my way down. I was absolutely amazed at how these work. I got into it by drawing my name and writing things with the water. It came clean instantly and I was very pleased. I am not sure if this is the strongest or weakest that they get, but I think it does a great job.
It was portable with wheels and very easy to start. I had no problems. It also did a great job on the outside of my house and my back porch. I can't give you a price because my grandmother had no idea and I have never priced them in the past.