I've had a 6s long enough to pay it off, hasn't broken yet even though it falls out of my pocket at the gym or gets bumped with a weight literally every day. I have a $40 screen protector with a lifetime warranty that has been protecting my phone screens for years.

If someone were to buy an iPhone I'd recommend a 6s, since the 7 is just inconvenient for a few reasons... From Apple it is only $550, you could probably buy it for half that somewhere else.