I have 3 of the original XDS, as I loved the original design (grip texture). I have only fired about 400 rounds thru the one I carry all the time. I have never has a malfunction of any kind. I can give to friends to try and they will have failures to feed. I do know that on my particular XDS .45, it requires a really firm grip as any sort of limp wrist or light grip will cause the gun to FTF.
Just my particular observations of my gun.