"Have owned this machine for 4 years now, used for washing hot tub filters and decking mainly. Whilst it is effective (although nowhere near as good as a petrol washer) It has spent as much time being repaired as in use. It has a very fragile switch and sensors for water pressure which break often. I may have had a one off duff one, but with repair costs included it has over the years probably cost double what I paid for it. Will stick to a decent petrol in future, more flexible and more reliable. In a nutshell, avoid Nilfisk"