After performing the adjustments via the Avia HT DVD with the color lenses to look through, I did notice a very noticeable adjustment in picture quality.

Color can be a bit subjective. However, one concrete thing it did for me is get rid of the fuzzies in large, light colored areas such as a sky scene. Until I did the calibration a couple of times and got it right, my sky scenes and such looked like fuzzy SD even in the best, most detailed HD content.

With great power comes Awesome irresponsibility.