A Direct TV CSR replaced my HR20-700 with the HR23 because the HR20 developed an intermittent problem with low or no satellite signal. He first replaced the 5LNB module with no improvement. As he took the HR23 out of the box, I saw it had no provision for OTA, so I called Direct TV and requested the AM21. When I activated the AM21, the guide seems much slower than it did with just the HR23. The HR23 without the AM21, by the way, was quicker than the HR20. Anyone else experience this? Is there any alternative to fix it?