So far it's a solid device with a beautiful screen. There is a noticeable "bump" on the screen where the fold is as far as feel, but at least in this brand-new device it's not very noticeable when you look at it. I'm not sure what it will look like in a year, but hopefully not much more obvious. It's very slippery so that's something to think about. Good button placement. I like the flip aspect of it but I cringe every time I open it thinking I'm shortening its useful screen life. Only time will tell. Samsung says 200,000 openings, but that's probably not as much as it sounds.
I had a Z Flip4 for a couple of years and really liked it. I have had the Flip6 for a few weeks and love it. There was very little learning curve from a previous version to this one. I like the updated features (like the larger screen on back of the phone).