This is my first iOS phone I m using since last 1 month, performance of camera, ram, processor, sound, user interface etc.are Awesome Experience with iPhone 6s Plus Gold.The screen quality is really good contrary to what I thought.the daylight visibility is actually much better than the samsung super amoled screens, although the color contrast may not be as good as a super amoled screen, it is useable.
I use the phone for whatsapp, browsing and calls and till now havent experienced any slowness. The back camera is decent but the front camera is just excellent.