I have been using Microsoft List Builder previously. You product is excellent. I will be cancelling my List Builder at the end of this month!
You guys totally rock and you always have an answer!
...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.