I use the AVIA disk about once a month to calibrate my TV perfectly for DVD viewing. Its amazing the difference between normal settings and the calibrated settings. The problem is there's HUGE differences between color/contrast/brightness/tint etc. with varying sources, like if you calibrated 2 different DVD players to your TV, the settings could be drastically different. Speaking along these lines, its hard to calibrate other sources, like HDTV, or Cable, or video gaming. To try and calibrate my Xbox, I borrow a DVD remote and use the avia disk in there, that helps somewhat, except I think varying games have different contrast/brightness settings. As for HDTV, I have no clue what todo, I do use SOFT white level for HDTV, but besides that there's 0 test patterns to try to calibrate. And Cable is real hard, especially since the digital box is crap. Local channels, and digital channels are varied on color levels etc, has HUGE RED PUSH. Also its wierd that COAX looks nicer than Svideo or RCA on my Box, But there's no way to calibrate the box. So I wonder what is the solution to these problems?? it would be nice if I could get the cable company to have a calibration channel that showed test patterns, same for HDTV, which calibrating HDTV correctly would definatly show huge differences. Right now 1080iHDTV is beautiful, but I think my DVD's look nicer, only because its properly calibrated. HDTV I think has a very strong white level, which is hard to set dark level correctly, not to mention its very SHARP, and probably needs sharpness dropped drastically, but I can't EYE these settings while watching a football game.