Just picked this up Saturday at BB. Had to return it because the first one had a big dim spot towards the bottom of the screen, just left of center. The second one is perfect though. I love the HDR notification you get to let you know when you're watching HDR content. I also love the lack of a motion smoother option as I've always hated it.
The biggest thing for me as a big gamer though is the input lag, or rather, lack there of. It's so much better than my regular Samsung 1080p set, even with HDR enabled. It's just so much more responsive than a lot of TV's, and given the size and picture quality, that's amazing for a $600 Set.
I feel like TCL concentrated on the things that really matter to me and did it for $600. I'm glad I waited until I did to jump into the 4K/HDR game because this is everything I was looking for and came in at $200 less than anything else even remotely comparable.