Mine (purchased March 2006) had serious functioning problems. The firing pin block plunger would hang up on the rear of the frame, causing the slide to not return to battery about 40% of the time. Since A - I generally believe in giving people a second chance, and B - no other gun shares this gun's combination of attributes, I e-mailed Dottie Herold (who seems to be the customer service department) and got a return authorization. They replaced the barrel and recoil spring and it has been fine ever since. It did take nearly a month to get back, and I did pay the initial shipping charge from here to there, although they paid the charge from there to here.
Whenever someone is looking for a full-caliber yet still pocket-sized pistol, I always recommend the PM9.