I started watching this a couple of days ago, and wasted 30 minutes trouble-shooting my system, trying to figure out why it wasn't displaying HDR!!And unfortunately, once I realized it was 4k, but not HDR, I ran into frequent pixelation and loss of audio. I cleaned it thoroughly with water, but it didn't fix the problem. I bought it at Amazon, and they are replacing it, as there's probably just something funky about the disc.I ended up watching the regular Bluray, in part just to see how it looked compared to the 4k. There was definitely a loss of detail and 'pop' to the picture. I agree - the 4k disc, even without HDR, looked quite good.I really enjoyed it for the first half of the movie, being drawn in as the plot began to reveal itself. But I was disappointed in the second half, with the acting and the family's reaction as the 'horror' aspect took over.But I'll give it a second watch once the replacement disc gets here, and see if my opinion changes at all.