I also have one of the late production PPK/S .22s. I like it! Fine little gun and very accurate.
Yeah, the DA trigger is terrible. But then most folks only fire the first shot DA. Everything after that is SA, which is fine. The folks over on the Walther board assure me that given time and use, the DA trigger pull will smooth out considerably. I'm still waiting to find out as I don't shoot it much DA.
Mine also likes high velocity ammo. The darn thing just absolutely loves cheap old Remington Thunderbolts.