I have had experience with two of the S&W PPK models. When they first came out I bought one and it was an unreliable mess.

Recently (probably 20 years later) I bought another one and it is both reliable and accurate. I took a fine file and broke all those sharp edges it came with, put a small strip of 3M tread tape on the front of the grip, use a PPK/s magazine with an adapter for one more round, and it's great.

I have found the S&W PPK to be the perfect minimalist summer pistol, and it displays Walther quality and dependability.