I switched from Nexus 5 to iPhone 5S.
Nexus is brilliant phone in many many ways and emails are lighting fast much much faster than even Blackberry and iOS. Google apps integration is brilliant but then you start noticing small small things and you realize that its not only OS but whole ecosystem which makes the difference. My iPhone is synced with my MAB and mini tab - and works as amazing normal phone and also smart phone.
Nexus 5 after all its zillion google system integration was not good or lets say completed rounded OS - Swype app keeps on crashing, text app’ texter’ is crashing, few occasions phone was ringing and no notification who was calling and what the heck not a single single app which can sync notes general everyday notes’ two brilliant apps for iPhone iOS Note and Notestab Pro on iOS’ between my computer and phone. NO app for backup to computer esp. MAC OS X and no app for transfer of SMS’ 13500+ texts’ n contacts easily between iOS n Android.
Notable crashes of office app’ pre installed’ - confusing Hangout.