My wife got one of the early models and really liked it. The battery did suck though. She's excited about getting one again that's supposed have better battery, and more convenient dimensions.
First one was a Samsung flip, which just folds a regular phone in half. It's not really usable folded beyond notifications and such. It was convenient for video calls to be partially folded and set on a table. Also you could hang up on people by closing the phone, which was cool to be able to do again.
New one is a Samsung fold which is more usable as a phone when folded.