I use iphone for years now. and this device is definitely my favorite. have no problem using it. beautiful rosegold color, beautiful smooth graphic. I love it. it's just that iphone hasn't made any great inventions yet. i'm still waiting patiently. I used both ios and android, now i'm 100% ios user ( again) . still more comfortable using this iOS.
go for the iOS you need and comfortable in using it. don't be biased by reviews and technologies, because it changes like, forever. your 3-months-old device will soon be old fashioned device when the newest one comes out : )