Houston, we have no problem (OTA through HD HomeRun). I was getting no updates through zap2it. Just did Setup TV Signal (I previously restarted hoping it would snap in to Rovi on its own, but it didn't). All channels we watch were there with unchanged numbers, and we got a bunch of extra ones in the guide (probably from neighboring areas) that we have no signal on, so I may delete them if I feel like doing it. The guide appears to be complete, and the recording settings are unaffected. After reading all this, I was prepared for a major hassle, but it turned out to be simple and easy.