I have a 622 now and when I first got it I was thinking that the over the air ATSC tuner performed better than my Dish 811 OTA tuners. More recently I have had occasion to compare the 622s ATSC tuner to my Samsung LNT-1953H, which has a built in ATSC tuner. It seems as if there are times where I get picture with the LNT1953H when I lose it with the 622. Ironically I have both of them connected to the same Channel Master antenna. I suspect that the problem is MPDI (multi path distortion interference), but that is purely speculation on my part. Anyway, with more people getting the converter boxes, I am wondering how others 622 OTA performance compares to other ATSC tuners that you may have. Also, I suspect that the newer crop on ATSC tuners are better at dealing with MPDI, but again that is purely speculation on my part.