I purchased my Cocoons almost 2 years ago and until today would have given them a 5. Now it is a 1. They advertise a lifetime guarantee on the frames, mine lasted 2 years. Both temples are disintegrating, the wire stiffener is sticking out on both sides and the plastic or rubber is coming apart. They claim that oils from the skin will cause them to deteriorate. They are replacing them with a $8.95 shipping fee. That would be more than fair after 8 or 10 years but 2 years is much too quick. Not what I expected for $49.95.