A large community down the street from me is served by Adelphia and has historically suffered serious reliability and speed issues. That didn't fill me with confidence, but, when you're a crack smoker and you gotta get your bit fix, you'll dance with the devil. The 12 intro rate of $26/month was a major factor in the decision where I was paying triple that price for unreliable service. So taking the plunge wasn't too hard to do.
Of course the install didn't go very well. I have some networking experience and I know what a high pass filter is and what collision domains are, but still I had to have a couple of Adelphia techs come out and fiddle with my gear (it turns out the green box in the backyard needed some tweaks). Since then, I have yet to have an outage of any kind, but in the evenings the connection is dog ass slow where the fixed wireless solution was consistent in it's rate of thruput (when it was working).
I don't think I have EVER had an outage on my phone line (other than outages due to east coast black outs, hurricanes or Nor'Easters). Why is residential broadband so unreliable?