I bought my iPhone 6s rose gold 16 gb, the performance is good u got some new features like 3D Touch which is amazing also makes everything so easy and it has a9 chip in built which is more faster . It has 2 gb ram.
When we come to camera iPhone is the best and especially iPhone 6s with 12 mp rear camera and 5mp front camera, u can capture Live Photos, u can shoot 4K videos, this phone is so smooth and fast.it also has 3 levels of flashlight high medium low which is great.
One thing was not great that is the battery life