The switch to Fios (from Comcast) could not have gone smoother. Fios guy installs everything (doing triple play). Pop my Comcast CableCard out....rerun guided set-up on my Tivo HD...Verizon pairs my host ID with the Fios CableCard. Done! Best thing of all...all my Season Passes were automatically re-mapped to the Fios channels. I wasn't expecting that, I thought I'd have to reset all of them up. Awesome! About as seamless transition as anyone could wish for.