If you're a DISH or DIRECTV customer, you're probably already getting your local network channels, hopefully in high def, on your existing receiver or DVR. These channels are delivered via satellite using something called "spot beaming." This technique assures that customers only receive local broadcasts for their specific geographic location. For the most part, this works fine, but there are some drawbacks. The quality of these re-broadcast local channels can suffer as they undergo compression to fit within the satellite signal's bandwidth. Also, when station owners renegotiate their terms with your satellite provider (as is currently happening with LIN Media and DISH), you may be subject to blackouts in your local service. What's a poor TV addict to do?..
... I found at least a handful of digital channels broadcasting in HD, that were not being offered by my DISH Network service.
Now, not only does the OTA module offer more channel options, but it also offers more DVR options. On its own, my 722k box is a dual tuner set-top box. It currently feeds DISH Network signals and a shared DVR to my living room and bedroom TVs. The OTA module adds in two additional OTA tuners, which means two additional recording options as well. Drooling yet?
In the DVR's single output mode (cutting off the bedroom TV - sorry, honey!), I was able to record two OTA channels and two satellite channels at the same time. Just an FYI: Assuming you have the need to record four shows at once, you won't be able to watch a fifth. That's just downright greedy!