"First of all, it was because of the positive experience working with you in the past that we agreed to have you audit our existing program and make suggestions. Your response was quick, your recommendations clear and timely........
As it is, at the end of the day, having implemented your suggestions to the "T," we currently have a much faster system, much better band width configuration, and are paying almost exactly HALF of what we were paying before.
In my experienced opinion, anyone would be an idiot not to avail themselves of your service; it is a NO LOSE proposition. Either they save money for comparable or better service, or they owe you nothing, while bolstering the satisfaction and peace of mind that comes from KNOWING that they have the best deal available."