"It is not often I am compelled to write a letter of this type. Avis and I wanted you to know what an enjoyable experience it has been to work with your company. Your son, Ted, who was meticulous in his measurements and calculations, and the installers, John and John, were most pleasant and professional as were the members of your office staff when calling on the phone.
The shutter installation was perfect and we are extremely pleased. We can't believe we did not do this installation many years ago. The shutters have made a great improvement in our home. We are pleased that we chose your company over the other bidders.
Our best wishes for your continued success."