I purchased this TV after reading reviews and visiting the showroom several times. This is an expensive purchase and i expected this TV to meet my expectations. It did so with flying colors. This is probably as good as it gets for current LED technology. I have been playing around with the settings, and my TV has not been professionally calibrated. Here are my observations: -This TV can be very bright and is really pops with HDR video. -It is a fantastic upscaler whether it be from component dvd, cable 1080p, blu-ray, streaming video, or the playstation game machine. -It produces very deep blacks and bright whites. - For the most part motion is very smooth and judder free. One exception is amazon which seems to produce overly compressed video -This TV is loaded with apps such as amazon, Netflix, Vudu, Sony Ultra, Playstation Vue, Hulu, Google Play, Youtube, and others, with plenty of onboard memory for adding more apps. -The Netflix and Amazon apps are now 4k and offer HDR content though on a limited basis - I'm able to stream 4K with HDR over wifi -There are 4 HDMI inputs, but only #s 2 and 3 accept 4k with HDR 1 and 3 accept 4k but not HDR and if you use ARC, which uses 3 then there is only one left (2) with the full bandwidth for HDR. -I use optical out for sound as my receiver is not HDMI. I have a 3.1 speaker setup and I'm getting 3.1 channel sound from the TV. -The operating system, though somewhat sluggish at times, has been very stable. I have experienced no crashes. -There are a lot of settings by picture type such as color, motion, etc. It takes a while to become familiar with them. Each input retains its own settings. I think the apps are grouped under the same settings. -It takes a while to become comfortable with the remote which is not backlit. I find it to be very directional, requiring several attempts sometimes to communicate with the TV. -I have not yet viewed Ultra HD content from a disc, as i don't have a Ultra HD blu-ray player. I received 8 free Ultra HD HDR movies from Sony for viewing on their Ultra website. They were outstanding For the most part, the ultra HD content on Amazon and Netflix is not at that quality, but still very good. - Ant-Man in 3D and it was very good, with great brightness. -Overall, I am extremely satisfied with this purchase and would highly recommend it. It provides the ultimate in video presentation with deep blacks and very little haloing on program credits. On most letter box presentations, the black borders are pure black, which make me think that the content provider is the cause when less than 100% black. I think the same may also apply to program credits. -I am continually amazed at the sharpness, contrast, color, depth, and smooth motion that this set provides. You won't go wrong with this TV purchase.