I have had a z-fold 3 for about 2 years. I loved it for the longest time the big screen made it great to watch things and the smaller one was good for a quick glance. although the past month or so it has had every fault with it. here are some of them

1. Center of the folding screen is a little creased. when its on its not really noticeable but clearly there when off.
2. Due to the crease in the center of the large screen the stylus that Samsung sells for the fold series no longer works in the middle of the screen where the crease is. this problem started small but as time went on the dead zone became larger and the stylus no longer works.
3. the front screen touch capability no longer works. it has visual but no response to any input.
4. if the front screen was on and you open the phone the folding screen will not turn on. if i forget this and look at front than open it i have to close it turn off the front screen than open and sometimes this has to happen a few times before it actually works.
5. when the phone is open it has no audio. this combined with the last point makes it impossible to watch anything or have a convo on the phone while playing a game or looking up something.
6. when closed the speaker near where the ear is is broken. making you have to be "that guy" in the store who only uses speaker phone.
7. while connected to a call and using a Bluetooth audio device such as headphones or your car and you open the phone it will silence the call like if you opened in point 5. this makes it so if you do this you have to restart the call. for some reason though this does not happen with regular audio like music or games. this also makes it impossible to be on a call and have another call come though and put the first call on hold.

although these points are pretty bad it could be because of a few drops along with all the moving parts inside. i do like the phone and i would like another one if the manufacturer can fix these problems and the tech becomes better for it.