Before I had my unit calibrated, I was constantly messing with settings from this board and from anyone else that posted their numbers. When watching a dvd or ota broadcasts I was messing with the settings, seemed liked I was never happy or thought I was missing something! After I received my unit back it looked really good, but I thought I would notice a dramatic difference. Maybe my expectations were too high. However, after a few hours of viewing I started noticing differences in shadow details, blacks and general details. I waited about a week and returned one of my presets back to the pre calibration numbers and then viewed my reference dvd and it looked all wrong! I went back to the calibrated settings and have not touched them again and have no desire to fiddle around with them like before. I had a mail in calibration done, so there are some factors that have to be taken into account such as screen type, dvd player, ota tuner and other items that are out of the hands of the guy doing the calibration as opposed to having someone come to your house and doing it.