I heard about the Prism service too and had difficulty with COX internet so decided to give CenturyLink a try.
All I can say is that I never got my system installed because their promotional package price was a moving target. I got lured into an all- in-one price of just under $100. My many calls to get a written confirmation met with various reps giving me prices as high as $180. I even went into their local store to find out what my service was going to cost and still could not come up with a written confirmation. At the store the sales rep hand wrote what my monthly cost was going to be from a computer screen!! When I asked her why she could not give me a printout of what my service was going to cost, the reply was that this is company confidential information and we cannot give you a printout!!
I could never get any written confirmation or email giving me the assurance that they would not send me some crazy high bill and try to ruin my credit if i did not pay it.
Needless to say they never confirmed the prices and gave me all sorts of stories including "it is our corporate policy to not put anything in writing."
I never got to experience the service. So I do not know. I guess I am going to live with COX's shortcomings. At Least COX honors their package prices and I know what I am going to get charged at the end of the month.
This phone ordeal with CenturyLink took hours and hours of my time. If you have free time and don't have anything better to do, give CenturyLink a try.