I had my Samsung LN55C650 LCD flat panel TV calibrated by Greg Erianne of All High Def (allhighdef.com) of Watertown, CT. I had been a bit skeptical of what the calibration could accomplish, given the erratic quality of picture content from TV sources, whether delivered by cable or satellite or antenna. By that I mean the sometimes dramatic differences in lighting, hue, contrast etc from scene to scene even within the same show.
After having the set calibrated, I am convinced that it was well worth the very reasonable expense. As I now understand, having the set's picture tuned to a steady and accurate baseline for grayscale, white balance, gamma, custom color space etc greatly reduces my need to tweak settings while watching a show, a habit which has always driven my wife crazy.
Yes, I may still bump the backlighting up or down a bit, or adjust the tint to get the most natural-looking picture, but I find myself doing that much less than before, and most of the time I am delighted by how fine and true the picture looks "as is" and other than that occasional adjustment of lighting or hue, I can relax and leave all the other settings alone. Freed from obsessive tweaking and re-tweaking, I am now enjoying and appreciating this fine TV more than I ever expected to. Whether I'm watching TV or DVD the picture looks great all the time.
And Greg Erianne impressed me and my wife considerably with his professionalism and attention to detail. We do not take it lightly when inviting a new person into our home. Greg arrived at our house right on time, and was very pleasant and interesting to talk with. He then went straight to work, and about 4 hours later had completed a full calibration, complete with printed documentation of the before-and-after settings as well as a full "lab bench" report showing before and after results for RGB Balance, Gamma Point, Gamma Luminance, Color Temp, Gamut CIE and DeltaE 1994.
More important, to me, was what my eyes saw; I don't pretend to be as technically knowledgeable as many of the posters here, but I know what I like, and I really like the picture I'm seeing on my TV - I thought that I liked it already, but now I can see an undeniable improvement and stability. I really love this TV!
One last thing: I'm a subscriber to Netflix streaming video over my home's wi-fi network, but had been greatly frustrated by an inability to adjust basic settings like color level or brightness when watching a Netflix movie. Greg set up both Day and Night versions of calibrated settings for when my TV is streaming Netflix movies, AND showed me how I can modify those settings as needed. I could not be a more satisfied customer, and would without hesitation recommend his services to anyone in Greg's service range, which I believe encompasses parts of Connecticut, New York, and New Jersey.