First, you will find lots of opinions on the gun by using the SEARCH feature of this board. It will locate posts discussing the pistol.
Generally, the PPK is considered a classic little gun - some people have problems with the slide cutting their hand when they fire it.
What do you plan to do with it? Is this for target shooting and 'plinking'?
I think you meant the .380 ACP round - .308 is a rifle cartridge.