Dear PennyWise, I wanted to let you know how happy we have been with your work. You have done an outstanding job of not only doing the routine jobs we ask but have aggressively attacked the problem areas to solve those situations in a very professional and timely manner. These problem areas could have cost us substantial loss of revenue and we feel that was kept to a minimum due to the way you handled the situations. We could not be more please with your work and have recommended your services to several other people. Feel free to use us as a reference contact with any potential customers
..more 
