So far they work perfectly. Assembling the sockets is a bit confusing as there were no instructions but the box said to follow the instructions that came with it. The only problem I had was with the mother. The supplied nut is not self-locking! You must specify your own self-blocking type during installation or use thread blocking. Not sure if the lifespan is as strong as my old Bilsteins, but I still won't go back if they fail prematurely. As long as they exist, I will remain a Gabriel customer. * Installed on a 2007 Tacoma. No mods required.