I've been buying Apple products mainly for their reliability and durability. There is an obvious weakness around the home button on the iphone6, that could have been prevented with more careful design. Steve Jobs would have not let it out like this. Siting on the phone is not my favorite past time but can happen on occasion. My iphone 5S, 4S, 4, have all survived many years of abuse including drops, sitting on, stepping on, left in rain and other careless actions. And I'm sure I'm not the only one with similar phone-surviving experiences of the 4-5 lines of the iPhones. I watched Apple employees in the Apple store, they are carrying there iphones in their back pocket all day. At some point they might sit down for a sec without remembering to take the phone out. It just what people will eventually do who dare to put their phone in their back pocket, which generally I prefer not to do so, but sometimes you just need to put it somewhere in the hurry.
Like with a car, you not supposed to hit anything even at 5 miles/hour, but if it does happen and it renders the car useless, that is a poor construction for an everyday driver IMO regardless of how fast it accelerates or how it handles or whatever bells and whistles it comes with.
I'm sure Apple has better things to do then replacing countless screens. At $109 including labor they are not happy campers either considering cost of operation in the US, I'm sure.. It would have helped studying some typical user behaviors before rushing out with the new product. I hope they are learning from this.