I purchased the 77in LG C3 OLED over 1 months ago bast on extensive research in picture quality, durability, and ease of use. Delivery was on time and well handled. Unboxing and setup was very easy, though does require a second set of hands due to size. The TV itself is not overly heavy, and changing over from the included base to a wall mount was also simple and easy.
Setting up the TV for use was quick and simple, though the requirement of creating a LG account to use the integrated software for streaming apps is a detriment. At the very least there are settings to disable most of the data harvesting and advertisement content it uses. For a few weeks I used a Amazon Fire Stick 4k Max as an alternative, though that itself is still littered with excessive advertisements and the functionality simply doesn't work the greatest. I was unable to even use Plex at all due to constant buffering, and other apps including Paramount Plus and Apple TV were intermittently unusable. Once I got the LG account set up, installing and using the apps on the LG webOS software was practically seamless. Despite my grievance with data harvesting, the software allows a lot of freedom with opting out of advertisements, and what little advertisements remain are not intrusive. The webOS software is very easy to use and I have no noteworthy complaints other than the account requirement.
As for the TV picture itself, it is fantastic. There are a ton of settings that can be adjusted for your personal preference, but I recommend starting with the recommended settings from the Rtings review/guide and making adjustments from there. As an OLED the colors really pop, the blacks are deep and true, and it really transforms the content you are watching. Of course, some of it depends on the content itself and wether or not it supports various technologies like HDR, Dolby Vision, etc... though even content that does not support that still looks better than a cheaper LCD panel.
As for sound, the integrated speakers are subpar like all TV's. It's fine for general live TV like sports and other content where the sound and visual quality isn't a concern but suffers when it comes to movies and shows where soundscape and ambiance are important. I would highly recommend using this TV in conjunction with a surround sound system. The TV supports eArc which allows seamless use of external audio systems, and if you use a LG soundbar system there is a feature which utilizes the integrated TV speakers to add additional depth to the sound system. If you're using a quality sound system it is not necessary as the Dolby Atmos support is spectacular, though it does help out the cheaper LG soundbar systems that do not include rear and upfiring speakers.
Overall, this TV is fantastic higher end OLED option, and if on sale is likely the best value TV you could purchase. I know of many people who utilize the smaller 40in offering as a PC monitor and love it, especially with advances to OLED technology negating much of the concern with burn in. I recommend this specific TV to everyone looking for a high quality picture while still maintaining ease of use and reliability, all without breaking the bank. The pictures I took don't do it justice. This one is worth seeing for yourself in the store.