I've been using Samsung's Note 8 for about a month now. I love the display on the phone and the camera, but I'm pretty much constantly annoyed by the phone's Bixby button.
The dedicated button on the left side of the phone is designed to give you quick access to to the personal assistant. That's great if you want to use it often. However, if you're ham-fingered like me, then you end up accidentally pressing it pretty much every time you try to lower the volume on your phone, or pull it out of your pocket, or when you try to take a picture... really pretty much any time you're holding the phone.