I'm really starting to miss the simplicity of the old standard home button.
The first 5S I had was great for a while. No loud clicking. Then randomly one day, a couple weeks after getting it, it started making this horrible crunching sound, and the click started feeling very uneven.  I took it to the Genius Bar for a fresh one.
This one has had a loud click at certain angles from day one.  And now the sapphire crystal has developed a wiggle. 
For lack of a better way to describe it, the button feels, dirty. I feel like dirt is getting trapped inside, and around the edge.  It feels oily too. 
I don't now why Apple couldn't implement touch id into the old design. When I saw the blow apart animation of the new button assembly, I immediately thought to myself, man this has way too many parts, and is going to fail. 
I love the speed of the new chip. Touch ID is a real time saver and I would seriously miss it.  But I have considered selling my 5S and going back to a 5 because the button is driving me nuts.