Great phone, surprisingly powerful considering it's low hardware spec when comparing to Android super phones, iPhone is just as fast than Androids with 4 times the spec.
But it costs a lot more than an Android so many people are stuck with a 16GB model which runs out of space quick. Camera is amazing and better than the Sony Z3 (I had both). Fingerprint sensor is 100% accurate.
Apple's main drawback is that getting items on and of the phone / tablet is freaking hard, even for computer people but if you use the Total Downloader app then you can drag and drop via FTP or web browser and have a proper folder / file explorer and can by pass iTunes. https://itunes.apple.com/gb/app/total-downloader-free-browser/id557285579?mt=8