I have both the S&W and Interarms PPK and PPK/s models. My S&W PPK is a 2009 model and has been flawless, the PPK/s is a fixed re-call model and at times a bit of a jammaster but last time to the range and a change in ammo I went thru a box of 50 rounds and no problems. The S&W models have a longer tail on them and has stopped any "slide bite" I get with the IA models. I like the looks of the Interarms PPK(s) as they are right from the original design but I find both of mine like to FTE/FTF on occasion. I think in all my jam cases it is the type ammo I'm using more than any issues with the guns. Any of the PPK's are fun to shoot and for me more accurate than I am.