As we all know that any Apple product whether it's an iPhone or ipad or ipod or Mac doesn't need any review coz they are just Brilliant in terms of llok Performance & everything.
iPhone 6s is an another example of Apple's Brilliancy
It's 2GB Ram is equal to Android's 4GB
It's Operating System IOS is as fluid as butter
Apps & Games are atreat on an iPhone
It's Camera is not so good but it's decent & that's the area Apple need to Work upon in the future
Overall if you have good Money to spend on Phone then definitely go for an iPhone coz it will easily last for 4 year's eith Apple's support & timely updates.