I have the 6s and before that I had the 6 and the Note series as well as the Nexus line. So, before the announcement of the iPhone 7, I was considering the Note 7 because I liked the S2 watch and I heard a lot of great things about the Note 7.
Then the Note 7 battery started to have problems and made me rethink my decision. Like most Samsung phones that I have purchased a lot of stuff is thrown in there as experimental like the Retina scan. From all the reviews, i have seen, the Retina scan seems to be flawed. With the Apple OS, from my experience, it all seems to work pretty much all the time so, i can depend on it. The battery IMO also seems to be better and updates are faster than with the Android.
In the end, i am going to upgrade to the 7 plus and placed my order on Friday.