First time I'm using one of these.
It's on my 6s+.
Doesn't affect 3D as far as I can tell.
Only problem I seem to have is force touch from edge of screen to bring up apps frozen in background.
Oh and sliding up from bottom of screen. If I initiate it from just above the home button it's hit or miss. Going from the side is no problem.
I finally started using one because no matter how anal I am I inevitably get a micro scratches that only I can see, but bug the hell out of me.
My wife on the other hand tosses it into her purse, glovebox, etc and nary a scratch can be found. WTF?