I got this a few months ago -- 4k, solid brightness, and ok color.
Is it the OMG BEST? no. But I Disabled wifi, and even the channel display.
I use it with an apple TV with CEC on the TV -- I turn on the apple tv, TV turns on straight to apple interface. I turn off from the apple remote, TV turns off.
It's effectively "an apple TV" -- I'm happy.