I just got an F3 that's been through hell and back and it runs beautifully
Soft shutter release, the non HP is not bad with glasses, but the HP is even better
Smooooooooth film wind
Electronics on it should not be a concern

EDIT: I know someone above mentioned the Zone system and the FE2 and FM3A. Note that the meter on the F3 is 80/20 center weight over the traditional 60/40. This makes it a quasi spot meter