I have owned this LED Samsung for about two years now. Picture is great on Digital Channels or High Def. Analog channels without a strong signal can get a little fuzzy and I do not like the built in sound. Running sound through your own stereo or surround sytem is the best way to go.
I tried the LCD version of this TV first, but found the picture only so-so. Then I traded it in for the LED and what a difference. Not only are the colors more vibrant, but it actually looks 3D. I have actually had people ask me if it is a 3D set. I don't really use the Smart TV features, but if you have Netflix and don't have a TIVO, they could be useful.