Having had a few weeks to adjust to the 50LB6500 the slowness of the interface at startup and when pulling down the TV Guide is very frustrating. A single tuner in this model is a serious obstacle to usability. When you first turn on a TV the thing you most want to access is the guide, and you have to wait ages just to get the WebOS interface running, then wait even longer to see anything useful on the TV Guide.
One thing that would make the TV Guide more useful is a function to scan through the channels and grab the broadcast information. The current implementation of the App makes you do this manually. That's not really a Smart TV, it's a Lazy TV. Can't you do better with the guide LG?