Replaced a 5 year old LG Oled that had burn in on the screen. Wasn't happy about that and I hope 5 years later LG has made advances with Oled so this won't be my future. With that being said I am very happy with my LGC3. The picture is phenomenal and the updated Web OS is great.
I'm extremely happy with the picture quality. The sound is somewhat discouraging. The volume will change up and down even within the same sound bite. Different loudness between channels. I have to adjust the volume all the time while watching the TV.
Our LG 42C3 OLED replaced a 2006 40" UHD. Our choices were limited due to its location in a built in cabinet. The new picture is fabulous - in day or night time. The colors are brilliant and the contrast is unbelievable. An added benefit is the expanded viewing angle. No comment on the audio as we also bought a soundbar. The only negative is our learning curve with all the menu options and the (newer) Magic remote. It may take us a while to settle into our personal preferences.