I went from a iPhone 4s to a galaxy s5 then to the iPhone 6 and it is by
far the best phone I have ever had. It is very fast and responsive.
The camera is excellent and does not have the delay that the s5 had.
The finger print scanner is excellent and a feature that is surprisingly
useful. You can unlock your iPhone with it or purchase stuff online
with just your finger print. I know the s5 also has one but it is years
behind and can only be set up with one finger where the iPhone you can
set multiple fingers which makes it nice if you switch hands while using
the phone. Also you have to swipe to unlock the S5 which can take
multiple times to do where is the iPhone really takes more than a half
second touch and unlock. The battery life for me was about the same as
on the s5 although I did like the power saving mode on the s5 which
iPhone does not have. The charging time on the iPhone seems to be about
half the time it took to charge the galaxy S5 though so it's nice to
know if you can plug it in for a few minutes you can charge about a
percent per minute where the s5 was about 1% every two minutes. Another
thing I prefer on the iOS system is Siri which is also years ahead of
Google talk. Much more useful, understands me better, many more
functions and just much more refined. If you're on the fence for a new
phone the iPhone six will not disappoint you.