My P-64s have been reliable and accurate. Since there's not a lot to hold on to, the relatively small contact area with your hand means you feel the recoil. I don't like firing much more than 100 rounds on a trip to the range.
I'm no muscleman, but I can fire it DA with one finger. However, the accuracy when firing DA has to be poor. I have not replaced the springs since I figure the stiff DA acts kind of like a safety. I never intend to fire DA.
I bought my first one four years ago. Added three more soon after.