are there any improvements on previous buttons? with them always being a little iffy, could this just be something else to go wrong?
not trolling, despite dodgy home buttons ive had nothing but iphones since day 1 and really want a 5S
You are right in the sense that something could go wrong with the button. I guess that's the same for all the models released by Apple so far. However my concern would be after prolonged use would the touch ID sensor fail, would the sapphire crystal scratch etc. I guess Apple have done extensive research into this and have concluded that the sense will work for the duration of the phones life.
(on the other hand, if they did test it, why didn't they pick on the fact that the Black & Slate iP5 was prone to looking shabby after normal use last year [of course some people have taken more care over there phone so real world usage varies])
There are bound to be the odd one or two that fail but that's the same will all tech.
Only time will tell whether the Touch ID sensor will withstand everyday use. I guess the phone will have a years warranty so if anything goes wrong then you can always replace it for free. And if it becomes Touch ID-gate then Apple will most likely extend the warranty for the sensor beyond a year if they see fit (similar to iP4 and the extended case program a few years back).
Anthony