I just got the card, and installed it a little while ago. I'm just under 10 miles from the ESB, and am using a Silver Sensor indoor antenna. Some quick observations:
If I run it in DxVA mode with the Catalyst 4.2 drivers, I get spontaneous reboots, but it runs fine in software mode.
With the Silver Sensor, I pick up CBS, NBC, FOX, ABC, 2 PBSs (1 does HD, and the other has 4 digital sub-channels), and Telefutura. I only get 20-25% signal on the WB and nothing on Univision.
The analog tuner seems slightly better than my AIW, but not as good as using my VCR's tuner.
Doing a search for QAM stations from cable, it finds a few, but it won't let me tune to them. I know that there are some unencrypted QAM stations on my cable system.