"Naturally a satisfied customer is good advertisement."
"I am advising that Landis and his crew did an outstanding job on my building. I have already received several positive comments on the building. Naturally a satisfied customer is good advertisement. I have no problem whatsoever in recommending your company to anyone. Please advise Landis and his crew of the positive feedback. I am very appreciative of the fact that his crew worked several hours past normal working hours to expedite completion of my building."