I bought a Note9 last week. Best Buy had the unlocked 128GB one for $799 which I thought was a good deal. You can't disable or remap the Bixby button, but as of a patch yesterday you can make the button require a double press to activate. I'm pleased with the speakers, battery life, performance. Samsung's build of Oreo has a few nice things, a few frustrating. I like the ease of setting up folders with the Samsung launcher, but they've made moving/removing/uninstalling more difficult than it needs to be. I'm getting used to the app drawer being a horizontal instead of vertical scroll. I like that I can have multiple Bluetooth outputs at the same time -- so I can have a phone call on my earpiece and not interrupt the music streaming to my BT speaker. The S-Pen is great. The cameras are great.
If I had my druthers, I'd have stock Pie instead of dump the Samsung build completely.