I love Reachability. I find myself using it on my 6 while safari. I can't reach the top of my screen to enter a new address in the search bar but reachability solves that problem for me. Looking to find some more use cases.
Not at all on the plus. The phone is too big for one handed use for me, period. Reachability still means maneuvering the phone so i can reach the far side of the screen. I think I'd use it a fair bit on the 6.
I'm trying to teach myself to use it. I'm coming from Android to a 6 Plus so I am used to using massive phones without it. But the more I use it.. I like it. The GUI of it will probably change in iOS 9 though.
Wouldn't like the 6 without it. I must have small hands because this phone is pretty big. Still getting used to using reachability though. Sometimes I adjust my grip and stretch my thumb.