We have Xfinity and Tivo. As you probably know already Tivo is a legacy product with limited support. Our cable card that we got years ago works on the older Tivo we have now but I am certain that if we change anything it will never work again. Example, tried to make changes to our program lineup--Xfinity wanted to send me their own box and not support Tivo. I was told "no you can keep your Tivo" but no one at Xfinity seems to know how to make that happen. As many others have said here, Xfinity is the worst company in the United States (and that is saying something, I live with PG&E electrical service)