These work exceptionally well. I feel much more relaxed wearing my diamond earrings! They are not falling out! The back is a little hard to get on because you have to put your finger nail in the spring unit to open it up, which allows the stud to go in and lock. With long fingernails, its a bit challenging. I seriously don't think Id go back to regular earring backs. My earrings don't droop and stay nice and tight to my ear.