I have a 559, carbon steel frame. Have had several other 59`s and thrird gen 59xx`s and some 39`s too. It is a great shooter and just fun to own.
New guns have become like new cars. They all bear the same appearance. The 39`s and 59`s were unique.
They shoot well, some are fussy about ammo, some not.
IMHO, the thumb safety, mag disconnect and DA first shot are proven life savers. Maybe a little distracting but in real life, effective. They were designed for police and civilian self defense, not target pistols.
I hope you enjoy your new 59.
Jim