“They have been outstanding representatives of your company”

I would firstly ask you to make Dave aware of how pleased we are with the work that we have thus far seen. We would also wish him to know that it has been a pleasure to have Kelly, Tommy and latterly Nigel working on our house. They have been invariably cheerful, exceptionally tidy and polite. They have also taken a real pride in their work. In short, they have been outstanding representatives of your company.