I have no doubts that my XD9 service would malfunction in any way.. But I enjoy breaking down my guns and cleaning them after shooting.. And sometimes in between shootings if I haven't shot for a while. Owning every caliber and many different models of the XD, I would agree that they just keep going and going.
I just passed 7800 rounds through my XD9. Not a single hiccup to date. BTW thanks again to 21st Century. This has been the best firearm purchase I've ever made.