I am glad I have a HR20-700 because yesterday my NBC local in Fresno,Ca. lost its digital signal due to some failure. D also lost their signal so without ota I would not have been able to watch the NFL playoff games in HD. I just fired up my rotator and turned my antenna toward Bakersfield,Ca. and set up a secondary local on my HR20-700 and was able to watch the games in HD from Bakersfield ,ca. ota. Today NBC is still off the air in Fresno,CA and there is still no D signal for the NBC local. We get a message saying the station is down. Without ota I would not have been able to watch the games in HD. Just because D gives you locals in HD does not mean the signal will be there . If there is a problem with a stations transmitter D gets no signal to send to you.