I bought another "why not" gun today. A vintage Walther P1 9mm surplus gun.
Took it to the range and it performed way beyond my expectations. It shoots very accurately. Shot 50 rounds of Rem. and had no FTF or jams.
I know people that have had one for a long time, but I never thought about the P1. To me, it is a sleeper, you could not have a better shooting 9mm semi auto for $325 that shoots and good as this gun.
Field stripping and cleaning is very easy and fast.
Other than the mag release, I can see not drawbacks.
Parts if needed are easy to come by.