CenturyLink does have a limit - it's posted on their website "ttps://www.centurylink.com/aboutus/legal/internet-service-disclosure/full-version.html". It's 1TB, but they are not currently charging if you go over. Basically the same as Comcast. The only difference is that Comcast is sending out a warning to prepare you for when they do start to charge. I have had both CenturyLink and Comcast - no issues with either, so I switch back and forth for the best price
