Just wanted to drop you a quick note and say thanks for pointing me to your excellent service. I'm pleased with the results and am relieved that everything worked so well. One less thing to worry about!
Thank you, thank you, thank you!
...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.