Not everything I get from Vevor is brilliant, but this thing works really well on my terracotta tiled terrace. It's a lot better than just using a nozzle on the pressure washer because I tended to focus on the dirt in the grout lines rather than the tiles, whereas the surface cleaner does the whole tile too. I knocked a star off the overall rating because I think it's made from rubbish stainless steel and I think it needs regular inspection to prevent rusting