I used it one time but it was not at all what most would call normal usage. We had just lost our first year's client database so we used a purchased mailing list. Booked a $400 job ... it paid for the whole deal.
I just saw the new marketing package that JonDon will have ready in a couple of weeks. They handle it all after you want in newsletter or postcard format. They are going to do automatic mail outs of reminder letters, thank you letters what ever you want. email me for the particulars. johnclaude@valleyint.com