I have roadrunner and it fucking blows. But, where I live, it's the only option for high speed internet so I don't have a choice. I'm already wasting $50/mo on crappy service as it is, I would never even consider upgrading for another $10, but hey, that's just me.
Their customer support sucks, my connection fades in and out constantly, and sometimes I just can't get online at all for hours at a time. FUCK ROADRUNNER.