Buying at BEST BUY question

If I buy the Roamio 1TB OTA at Best Buy the price is $340, when I bring it home and activate it and let's say I use it for 5 days and don't like it. How does the "return policy" work, I mean I know I can return anything to Best Buy for 15 days, but what will happen with Tivo?? I am just a little concerned about the return process with the life time subscription. Any ideas?

Buying at BEST BUY question