Iphone 6s plus m is obviously a battery centric android phone that is made for very heavy users like businessmen or professionals who have to make calls, emails and stuff throughout the day. battery gives you 8-9hrs of SOT which is just incredible.
But the phone fails to deliver its best when it comes to other departments like camera and performance.
The iphone UI suffers occasional lag and the gaming performance on p1m is not the best. The 12mp and 5MP cameras are below average though and you wont like it if you take a lot of pictures.
The design is also nothing so special. I think the price should have been a couple grand less then it would be my recommendation