My father bought an Interarms PPK/s NIB sometime in the early '90s. He shot it a bit, maybe 150 rounds or so, then sold it to me. I wouldn't get through a single mag without jamming. When I got it, I gave it and the mags a good cleaning, then fired a few hundred rounds with pretty much the same results. This was my first .380 and I bought a 500 round case of ammo to go with it. I think by the time it smoothed out and functioned reliably, I had less than 100 rounds left out of that case. They take a break-in before they work. After I got it working, he wanted it back.
So, we traded for something else he had that I wanted. I like the Interarms better b/c it conforms more to the classic lines of the design, but I wouldn't hesitate to buy a Smith either.