I bought this last fall as well. I like it but still use it with a 2017 nvidia shield. Some of the apps just wouldn't load audio right and did very poorly with Dolby Vision.My ~10 year old Samsung TV died just after Christmas and I bought a TCL R646 75". I've been very happy with it, picture quality is really good. The initial knock on this TV was buggy software but most of those issues have been fixed by software updates (at least for me). I was a little leery about buying a less well known brand but so far, so good.
Other than that, the only problem I have with it now is that it frequently resets itself to Vivid mode after being in auto-Game mode when I play my xbox.
I also have a 2016 LG OLED. Great TV. Waiting for the 77 or 85" models to come down in price before upgrading.