On the Walther Interarms PPKs, this is strictly my opinion, I'm not an expert in anything....The downsides: The double action trigger was designed by someone a little sadistic. It racks hard partially due to its small size, the sight leaves a little to be desired. It has a sharp recoil, more punishing than my 9mm's for long term shooting. The upside.....It is extremely accurate. Unbelievable for its small size. Love the looks and size. I haven't found it to be unreliable. Why would anyone own a firearm that you didn't have confidence that it would go "bang" every time you pull the trigger? The Walther Smiths have had a recall and had some issues but thought they had most worked out. It terms of popularity, the German made Walthers are the most sought after and expensive, then the Interarms, followed by the S&W's. I think no matter what gun or caliber one ends up with, you should have verified its reliability before you ever think of signing up for a CHC class. IMHO, the positives outweigh the negatives on the Interarms PPKs. It depends mostly on what you plan on doing with it, your experience, and how you care of it.