My review: They are very detailed in their work but need to gather more experience to work efficiently. While cleaning my kitchen windows perfectly, he left a lot of the glass cleaning liquid accumulated in the sliding ledge. He also used too little water to mop the floor. So the spinning mop may not have a good rinse for better mopping. I felt not comfortable to inform them not to read his handphone so long while on a tight schedule. Overall it s ok only.