"We are pleased with the roof you and your crew put on for us. There was minimal inconvenience and much less mess than I anticipated. It was also pleasant to hear cheerful banter outside rather than loud music that might have disturbed the neighbors as well as us. And lastly, your willingness to keep communication channels open was welcome. Please do not hesitate to use us as a reference for any of your future jobs. We would be happy to let anyone know how easy it was to work with you."