I really like my iphone 6s. Some of the pluses are the screen clarity and camera.
The main gripe I have with it is the rounded sides. It is really prone to slipping off a chair arm, being dropped, etc. I had the iphone 4 and hardly ever dropped it. I drop the 6 about once a week. That being said it's pretty durable. I haven't broke the phone or cracked it and have owned it over a year. It also was submerged in a creek and worked after drying out in a bag of rice for 48 hours.