I have two Tivo Roamio's and 4 minis (through MoCa) for going on 6 years now. I had one bad cable card at the start, but it was likely my fault, because I sat some other equipment on it, and it was bent. Luckily, the Xfinity store is only 10-15 minutes away. In addition, at the time, dealers had access to a special phone number @ Comcast, where the techs worked directly with Tivo techs, so you didn't have to deal with standard offshore tech support. I'm not sure if that level of support still exists there or not.

Once everything was up and running, has been fairly flawless ever since. 90% of any technical issues have been traced back to Comcast issues, and have been fix with a phone call.

I Chose Tivo at the time because it already had the apps I was using in it, and no OEM DVR's offered them yet. I guess I'll stick with it until it, if it ever does, becomes obsolete, and unusable.