Retention first offered it to me for $399 (2 months ago). Laughed at them. They came back with $320, with $150 instant bill credit and free showtime and HBO for 6 months. Told them looks like I will be a Charter customer next week. They changed it to $318 with $150 instant credit and another $150 in credits spread over a 12 month span. I took that.
The more I thought of it, the more irritated I got that I had to shell out that much up front and wait for my money back. Called retention again (to also see when this lame waitlist will clear) and told them I want a more equitable agreement. We settled on this: I pay $199 spread over 3 months and they provide an immediate $199 credit on my bill on the first month. If you want to go for it, I am told it is called the friends and family program for the HR20.
Good luck.