Summary: I've had the TV for a few months. When I first got the TV I recall thinking the picture was excellent. The previous reviews I read were that the screen starts to fade after a year. That may be true but unless I had a new TV to compare with it's hard to notice. I don't use the 3-D feature. You need to buy a Sound Bar or Surround Sound System because the sound out of the TV is poor.
Summary: I've wanted a dark black that is not grayish looking which was my first priority. After viewing Pioneer KURO 60" TV that cost $7000 when it came out, I was speechless. Panasonic cannot match that kind of black level but it is significantly better than other LED, LCD, or plasma I've seen so far. The Samsung 8000 series LED with a local dimming is very close but I've noticed that lighting sometimes is not uniform and it cost $2k more which I would not spend.
Summary: I would have given this TV 5 stars because the picture and features are awesome. But the sound system is quite "tinny" sounding and I am going to have to find an external sound solution to truly enjoy the experience. I will probably purchase a sound bar and subwoofer. I was playing a well-known YouTube clip on it (you can access YouTube directly from the TV if you have it connected to the internet).