Posted in this thread a while back. Still have my original LG 55LK520. It was giving me some hassles early on with clouding a a small backlight leak. It still has a small backlight leak, but I spent roughly 2 days and 4 hours calibrating the TV and I am moderately pleased with it. Calibrating the TV helped a lot.
I turned the backlight way down and the image is much more rich and full then before. From the factory everything is really bright and colors really shine, but I love the way it looks now.
Looking back I would have spent an extra few hundred dollars on a nicer model, but at the price point I got the TV for and the no interest deal through Best Buy I am pleased.
I just wish all my sources were in HD, I am currently not HD for television which doesn't look good at all, but Blu Rays and other 1080p sources are very impressive.
Just a small update. Enjoying the TV, the 55inch is the best feature, love the big picture. Never gets old.