OK, here's a quick, high-level review of my initial impressions, subject to change as I learn more about configuration and operation.
Summary: Easy to install. Some setup issues with the SmartThings app, but most were resolved by using the remote. Nice remote. Art Mode and great form factor are worth the additional price. Wow-factor upgrade in picture quality although viewing angle isn't the greatest. Sound is OK but recommend at least a soundbar. Some annoying default settings, but very happy after initial rough calibration. Knew there would be some tradeoffs in video quality vs. similarly priced units, but very happy with purchase so far.
Here are more details:
Installation - Straightforward. Only issue was the lack of grip from the provided drywall anchors. Couldn't get as tight as I'd prefer. Glad I was able to find a stud for two of the screws. May rehang at a later date with toggle bolts instead of the drywall anchors. Still sits tight and solid on the wall. Like the ability to make micro-adjustments to get the TV to level after hanging.
OneConnect Box - Love the concept and not needing to run multiple cables to the TV. Runs a bit warm to the touch. Worked as expected.
Setup - Setup through the SmartThings app failed midway through and I completed with the remote via the TV.
Smart Remote - Works well and controls cable box and Blu-ray player. Easy to pair.
Art Mode - Great solution for common areas where you don't want to see a giant black rectangle when powered off. The art gallery is super fun. Images can transform a room and make it an asset to the decor instead of a liability. Does very well in daylight and bright rooms. Worth the extra money for the aesthetic value. The two main issues are that the image does not darken enough in dimmer lighting so it looks like a backlit image. Also the mattes don't look as 3d as they do in the online photos and the "shadowbox' matte completely destroys the illusion of art. I think the beige bezel would look better and sell the illusion better, but I'm not going to spend an extra $249.
Ambient Mode - SmartThings app failed in setup and I don't yet have it working right.
Image Quality - I haven't fully calibrated the TV yet, but initially I'm happy with it for a TV in the great room. Doesn't have the viewing angle of the plasma in my home theater setup, but wasn't expecting it to. Some wash-out of image when moving to the side and/or sitting on the floor, but still provides a wow-factor with HD Blu-ray and especially 4K video from Amazon Prime. Head-on viewing is really nice. Does a good job scaling an HD signal to 4K.
Sound - OK for the size of the TV, but I got a Vizio SB3651-E6 soundbar and plugged it into the Anynet+ port. Turns on/off as expected and volume control works through the Smart Remote ot Cable remote. Still working through some issues where the subwoofer cuts out if the soundbar is not in Direct mode, but I don't think it's a TV issue. In any case, there's now more than enough volume and low-end for my needs. Another great recommendation from the Wirecutter. Can't believe it was only $179.
Menu (Smart Hub) - I need to see what configuration options there are (or what operational shortcuts I may be missing), but out-of-the-box it's annoying to need to make several clicks to get to the settings menu or to change sources. Also, the default setting is that the menu pops up whenever the TV is turned on, and I needed to change a setting somewhere to make that stop.
- The "Intelligent Mode" "Adaptive Picture" setting gives you a store demo-like image, but it goes overboard. I turned it off along with the Ambient Light Detection to calibrate. After calibration, I turn the Ambient Light Detection on as needed. I'm using the following across all inputs as a baseline (calibrated with the THX optimizer), but am looking forward to seeing what rtings.com uses when it performs its review of the 2020 model.
Contrast Enhancer Off
Color Tone Warm 1
So far it's a definite keeper for me. Feel free to ask any questions and I'll answer as best I can.