Works well, but you need to know how it works.  The center post with the pressure regulator AND the safety lock in the end of the handle on the lid both leak steam while it is warming up. If you put the regulator on the post, the safety valve will NOT pop up to lock the lid, it will just keep blowing steam. The trick?  Prepare the pot as normal, put it on the stove on high, wait....about 10 minutes or until both the center post AND the safety lock hole are blowing steam, then...V E R Y  C A R E F U L L Y, using tongs or another tool that keeps your fingers away from the steam, drop the pressure regulator onto the center post and the safety lock will pop up just like that.  After that you reduce the burner to the desired temp and just wait til it's done.