...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.
I must admit you guys have the best service and prices compared to your competition - Keep up the good work!
You guys have a good service; I've recommended it to many people.