...having found your service by chance, we've been completely happy and pretty surprised actually. You offer a lot of features, with a very reasonable & logical rate system. ...How much your service will help is possibly beyond your understanding, but I'm sure you've heard that from other people using your service.
We were so happy with the results and service, we doubled our mailing schedule!
We are very happy with the service. Its really the best value out there right now. Period.