I have been doing bulk mailing and just did my first direct mailing campaign. I love it. I sent out 190 mailings and promised in the letter that I would call at the beginning of this month. Of the 190, I got 4 calls within the first week. I have called 92 of them back and of the 92, I have had 14 commit to sit down with me or allow me to schedule a demo. I closed 2 yesterday (one I met with that I followed back up with and one that called me the first business day after the mailing went out).
I love the direct mailing, however, with the round that I am doing, it is a year long, or more process. That is fine with the results that I have seen so far.