This exceeding expectations. It's very powerful and actually works better than my old K****** which died with a seized up motor after ten years. It removed some very bad stains from my paved terrace and made it look like a new one! Also it is very good value for money.
This is an excellent power supply. I have used it daily now for several months and there's no sign of cable wear or abnormal operation. The separate mains cable is a great idea and the lengths of both cables allows this unit to sit on the floor under my desk... out of sight and adding to a tidy office.