Their TVs are great, had 1 for more than 10 years and a second going on 6 and we’re really happy both.
Can’t speak for anything else though.
I’ve had terrible experiences with LG TVs. Parents owned an old and a newer model, both 65" I think. The OS was so fing slow, I couldn’t really browse through different apps smoothly and seemlessly. Couple this with how the older LG has issues with WiFi where you’d log in in the settings, confirm that the connection has been made, but then once you exited settings it was like if the connection wasn’t ever made in the first place.
I’ve had suuuch a better time with Roku TVs than LGs, I’ve owned 2 Rokus in my life. OS is smooth, apps are intuitive, no issues with connections. The idle screen is nice too.
No experience with Samsung TVs tho. Would be nice to see how an OLED looks, but my 4k Roku is fine for now