It is a great TV, the panel is perfect - free of banding, beautiful image and the picture processing is as good as you expect from a Panasonic - the reason I bought this rather than an LG or Sony, Panasonic always were the top for picture.
the TV unit is more solid than expected and even has little touches like a plastic "shelf" above the air vents to stop dust getting in there - something the others should do given how much dust was behind the TV when I installed it.
But the UI isn't exactly great, it does have catchup channels and the usual streaming ones but its not exactly the best UI ever. So buy these sets if you see them at a good price, and then buy a Roku or Nvidia Shield. Something you'll probably have to do in a few years with any other manufacturer as they discontinue older models.