I bought a new PPK/S a few months ago and seem to have broken it in with no failures of any kind, yes even with Gold-Dot and Hydra-Shok HPs. I've never fired an earlier version of this gun, but based on what I've read, S&W fixed the slide bite problem without introducing any new problems.
I fitted some Hogue wood grips and bought a pocket holster and an IWB holster - both Kydex. I plan to write a review once I shoot some ammo with the new grips on, but I can tell you that the only way for me to pocket-carry the PPK is in the pocket of a sturdy jacket or heavy coat - pants pocket or light coat pocket is out of the question - the gun is just too heavy or large. IWB carry is fine with a good belt - the PPK/S is nice and flat and the fact that it's not tiny makes a draw a little easier than with some micro-guns.
I found the recoil initially felt harsh, but I got used to it. Yeah, the DA trigger pull is very heavy, but I got used to that, too. At first I was sure I'd get a trigger job or play with the springs, but now I think I'm going to enjoy the challenge of handling that trigger pull. Also, I like the operating scheme: load / decock / disengage safety / carry with hammer down and safety off. I like it.
Just read Xavier's blog and he's right. Because the PPK is so sweet-looking, people expect it to be a breeze to operate, but it isn't. It takes a bit of strength to load, a lot of strength to replace the slide on the frame when you take it apart and strong fingers to work the trigger. And it kicks a bit. Definitely not a gun for a petite lady or elderly person.