The Note 8 Fingerprint Sensor works just fine for me

Picturing all of these people with their phones stuck up in front of their faces at dinner trying to login.
 
I do not like the placement of the FPS, that being said it has worked out fine. There are so many ways to unlock the phone (i use smart lock paired with my Gear Fit along with location based). The only time i am required to use the FPS is on some banking apps and my secure folder and then it is just something i make allowances for.