We are very pleased with the picture quality improvements over the 2018 version.
Wall mounting was no more difficult than any other tv, and hiding the single wire is much easier than running wires in the wall.
We use the Art Mode all the time - the Samsung offerings, the subscription offerings and increasingly our own photos as well. There are some limitations on using your own photos - not able to choose all matting options, and only one collage setting.
What we miss, though, is the full Ambient mode from previous years and promised in pre-launch literature and articles. With the 2019 Frame one can no longer take a photo and have the screen blend in to the background, nor display news, weather, etc.
In fact the remote no longer has an ambient mode button, though the manual refers to it. I suspect omitting the features was a late decision and really hope some would be restored in a software upgrade.
Apple's AirPlay 2 just appeared in the settings as promised and it works well.
As to Bixby, it worked well except it would respond to voices from the tv picked up by the remote so we turned off that function but can still press the mic button on the remote.
We purchased one of the metal Frames - white. They offer 4 colors so choose carefully since they are expensive.
Sound quality is what you would expect from a flat screen with no front speakers.
All in all, the Art Mode and fine picture quality makes this a unique addition to our home.