I have one in my living room with calibrated colours and it looks great, and although the integrated apps work great and Netflix has the DIAL protocol for casting I opted for a shield TV to take advantage of 4K 60FPS which is supported and looks great! It also has HDMI pass-through for those who have soundbars or basic receivers.
All in all, it's almost as good as this year's model of M-Series Vizio TVs, it has superior 24P playback and it's half the price of the current series which retails for $800+.
So if you're looking a great 4K TV for the price with low-input signal (with game mode toggled), this is great if you're budget-conscious.
If you want a more detailed analysis about this TV check out the review, Rtings did on them last year.
Before anyone ask, this TV does NOT do 4:4:4.