I'm loving mine. It actually feels like a new product and not the same slightly improved phones we get year after year that all feel similiar. Its great to just consume content on that large screen then fold it shut when your finished. Or using the outer screen for replying to quick messages ect. The screen also feels much better than I imagined it would. I was expecting it to feel flimsy but it actually feels pretty sturdy and nice to use. The only downsides for me are the crease which you don't notice much under the right light and when your consuming content but it is there. Obviously its just something that's part of the folding tech at the moment and it would be better without it so you kinda just accept it.
Secondly i think this is just a software bug, not sure if it happens on other 120hz Samsung phones with the adaptive refresh but i notice occasionally the home screen and browsing webpages will get stuck on 60hz even though its set to adaptive and should be 120hz on the large screen and turning the screen off and back on fixes it and gives it back the smooth 120hz. I presume thats just a software bug.
Overall those are the only 2 things that have bothered me and apart from that its a joy to use.