I recently got some new buttons and d-pad for my GCW Zero! 
These new buttons are awesome upgrades, and feel so much better than the stock buttons that originally ships with the GCW. 
Circular motions on the d-pad are smoother, and more precise, while the buttons feel more responsive and "solid".  Additionally, they're all a lot more quiet!
Besides, buttons in all red are pretty snazzy now. :)
 
