The benefit of these replacement parts is that you can use these parts to repair old models of PS4 controllers. The downsides are that some may need some cleaning up before installing into pre-existing components. There was too much plastic on the plastic liners due to what appears to have been used to make those parts. Also, the L2 and R2 buttons on the locking tabs weren't fully rounded, making this setup more difficult than necessary. You will need a utility knife to remove the excess plastic.