Iphone 6s is great device . it gives u everything like. Its superfast supersmooth .Great ui with 3d touch. Super responsive .
Good battery backup .
Good camera .slow motion videos are great at 240fps . 2nd generation fingerprint is awsm. one problem is that 16 gb 6s doesnt pay worth for its amount. If u can go for a 64gb version and u will be satisfied .the 2 gb ram plays the most of games at 60 fps .go for it !