When I got this month's Water bill I realized there was a leak somewhere in the house. I called on Thursday afternoon because I thought the source was the shut off knob next to the Water Meter. Faucet Fix arranged for someone to come out just before noon on Friday. My "diagnosis" was incorrect but Mark quickly found the real problem - the toilet in the basement. Within an hour of his arrival he removed the defective unit and installed a brand new one without leaving a speck of dust or a drop of water in either the downstairs bathroom or anywhere else on his way in or out of the house. I am impressed at how courteous and efficient Mark is.