I’ve used it several times, and it’s been just fine. Make sure you know your user name and password for your cable/satellite provider so you can sign in. If you don’t have that information handy, I’d get to work on that ASAP because sometimes it takes some time to speak to a real human being (at least with my provider). Also, depending on provider, you may have to turn on location services as well.
I’d make a trial run after you download app just to make sure everything is ready to go in time for the game. Good luck and Go Cats!