The newer PPKs I've seen (for several years now) have an extended beaver-tail - which should alleviate the 'slide bite'.
Also (some years ago) the PPKs had somewhat of a reputation as being 'Jammo-matics'. That also may NOT be an accurate claim in more recent years.
The Walther PPK is a true 'classic' and I've always wanted one.
There are what many knowledgeable gun enthusiasts would consider better CCW pistol choices - as regards caliber, size, weight, etc. But if I had a Walther PPK - I'd carry it. (Even though it is a 'blow-back' operated pistol.)
