If you're in the market, I have a 55" Insignia 4K LED Fire TV edition from Best Buy. Out the door for $423 ($487 today) with 5-year Geek Squad protection. No complaints after three years on performance. Navigation is simple with remote, voice, or phone. All the usual apps - Netflix, Hulu, Disney+, ESPN, etc.
The only drawback is you can only register one Prime account at a time on the TV. I just throw a Chromecast on HDMI 2 to stream content from fiancé's Prime account. No big deal.