We have MythTV and a 4 channel HD Grabber card. Similar concept. Works great if you have good TV reception and a lot of channels. My wife still uses, but frankly me not so much now.
Lot of this is online now though say our local PBS TV station streaming platform. Other stuff I can get from Tubi, and Pluto. The free Roku channel has a lot of stuff too. We also still have Netflix, but frankly I do not use it much. Would cancel except my Wife likes it.