MOTHERF*****R!! I actually have this model. Kaya pala immediately noticeable na it's not as nice as others. Even the upscaling is not as nice. Checkout "My thoughts about 4K" post. I've grown used to it so I'm not as bothered anymore, pero if this article is true, then it explains why I'm not as wowed with it. Then again, it's still a 55" TV with Wifi and Youtube. And it can play ALL 4k videos and HEVC files I throw at it. I have yet to get a video that I can't play with this model.
So all in all, for the price you pay, sulit pa rin. I'm not rationalizing, as I've already said my gripes in a separate post. Pero given the 55" size and low price and features, it's still worth considering at least. The thing that I'm wondering about is, even with other apps, it still detects the display as 3840x2160. Weird.