What sort of reputation does S&W have for its magazine springs?

I've been hearing a lot of complaints from owners and users of high capacity Beretta 92 owners that the springs don't hold up over time or stress. I don't hear the same problems from S&W users, but then, Beretta has a lot more autos in use than S&W.

According to a report in American Handgunner, springs should be able to be loaded for years with no problems. Does S&W make its own springs or does Mec-Gar or someone else make their mags?

Thanks!