I have a PF9. It is 100% reliable, but it is not fun to shoot. The recoil is about what you would expect, but that's not the problem. The slide release is a pure natural bear to operate. It's tight, it's rough, and the thumb platform is too small. It is my understanding that if you ask KelTec they will send you an over-sized release. I plan to ask as soon as I remember to during business hours. Today might be the day. Thanks for the reminder.
I have never fired the Smith, so I won't offer an opinion.