No regrets on the GSG, sanded slide from new with 1000 grit paper taped on the corner of a glass table and added the ZRT kit and never over oil it, over 25,000 rounds with very few fail to fire and almost never stove pipes, way less fussy about bullet choices than my CZ Shadow SP01 with a Kadet 2 adapter, My wife and daughter always want to shoot the GSG as the spring in the slide is easier to function than the CZ Kadet 2 slide.