I've cut a lot of chains and re-connected them with the same pin that I pushed out and none of them have failed at the cut link. These chains have been on all my personal commuter bikes and bikes that I've refurbed for friends. As long as you only cut the chain at that link once you should be okay. Just make sure that the link moves freely as normal. If my personal bikes have a quicklink and I have some sort of opportunity to replace the chain or shorten the chain I will remove the quicklink. I've had a few pop loose. I've also seen some bikes come with the wrong quicklink for the chain that's installed.