Direct Mailers?

I am think of doing some direct mailers through AT&T. What do guys think of that aproach? have any of you done it before? I fiqured it beats the heck out of printing them and then hitting the pavement myself or paying one of my guys. also if i sent out my self i would have to pay postage. I think through AT&T it would average out to 1.10 per mailer. Is it worth it?