Comcast continually boasts about having fastest Wifi/internet (currently paying for Extreme) however, speedtests inches away from "their" modem I'm lucky to maintain a signal equivalent to the slowest speed package they offer. Techs have been out, lines checked, modems swapped, NO HELP. In-home Techs blame outside line maintenance Techs, of course, they blame construction. Tried to get this poblem corrected for over nineteen months with Customer Service - NO HELP! Can't help but laugh everytime I see their commercials for fastest internet speeds. Currently reviewing Direct TV and sattelite internet provider.