i've been using the Samsung Z Fold8 for exactly two weeks (got it right after the iPhone Duo announcement), and so far it's one of the greatest phones i've ever used.
this is not my first foldable — i've had the Z Fold3, Z Fold6, Pixel Fold, and Pixel 9 Pro Fold. i love the new form factor, and i love how much they improved the haptics and the overall feel of the phone. it's light, super fast, and convenient in both form factors. it's also nice to have a manga and PDF reader that fits in my pocket.
i still hate One UI. i believe it wasn't made by humans. but Samsung offers so much customization that i can avoid a bunch of their design decisions.
i'm 100% sure the iPhone Duo will be a great phone too and will introduce foldables to a lot of people. however, the more reviews i see, the more i realize that proper multitasking and Android are worth more to me than nice animations and the Apple ecosystem.