It is really tall, that's the main reason I didn't get one for myself, this will be the wife's phone eventually (after I've taken it for a spin).
Just getting things installed, but man this looks, feels, and performs quite a bit better than the S8, those who say it's the same are wrong. I don't know if it's the extra ram or if it's software, but this is the fastest and smoothest I've ever experienced touchwiz. Fyi, I had the S8 earlier in the year.
The screen is awesome, as expected. Width wise, it's actually very comfortable, but it's going to take some time to get used to that height.
Multitasking is awesome. I can have a YouTube video going on the half and web browsing on the bottom, and the space I have for web browsing is about the same size as my entire iPhone 7.
That's it for now, but this is a very high quality phone and very polished, definite recommend if you can deal with the size.