I was a very loyal android user until I got this device. I have to be completely honest it blew me AWAY!!! The phone has zero lag, the calls are clear, pictures are crisp and pop out. The battery life is great despite the smaller battery. I can get a full day of usage before needing to charge my phone being a heavy user. The iPhone 6s Plus processor is blazing fast and this phone has wifi calling that comes with iOS 9.2, to help with people who may live in areas where coverage isn't the best.

3D Touch helps with shortcuts so you don't have to waste so much time searching for what u need. The camera both front and rear are simply amazing and also take Live Photos to where u can press down on the screen and u can see the pic in action. Watching videos on the 6s Plus almost makes your eyes dance because of how clear they appear on the device. Even tho Samsung is king with the amoled screen, the design and screen resolution of the 6s plus is giving Samsung a run for their money.

The only detractors that I have for this phone are the price and the storage space, primarily the 16GB. In order to get the best benefits of the iPhone 6s Plus is to get a 64 GB or higher. I think it is blasphemous that Apple made a 16GB device when most manufacturers have made the 32 GB a standard in the lowest amount of storage space. And because the 64GB is $100 more than the 16GB, that is definitely something Apple need to not do with the next series.
However overall this device is simply AMAZING. I hope that Apple gets even better with the iPhone 7
Pros:
3D Touch
Blazing fast processor
Front and back cameras awesome
Call clarity
Screen resolution
Wifi calling
Battery life
Cons:
Price
Storage (16GB come on man!!)