After plenty of research looking for a high powered pressure washer and weighing up the pros and cons of electric vs petrol i decided to go for the Wilks 550i as there was minimal difference in pressure and easier to store. Ive put it to use on my block paved drive that hasn't been cleaned for 10+ years. The machine is was easy to assemble out of box, and as expected appears study, well made with high quality fittings and attachments. It absolutely smashed through the dirt and even well established moss in the grooves. I'm delighted with my purchase and just hope it stands the test of time. Great product at the right price.