I used three, and its quite solid on my wall. Und das für mich größte Problem: KEINESFALLS DEN SCHLÜSSEL AN EINEM SCHLÜSSELBUND BEFESTIGEN! Only time will tell, but I don?t see these holding up to abuse and I wonder about long term use. Very good would buy again Originally when I ordered this item, it arrived broken. Hope to find a friend who uses an 8 so I can give it to her. I really like that phones: good sound and decent noise canceling, but at some point it stopped working with still 40% of battery charge left. So cute and elegant Its so nice to get rid of all the cords and 3 different chargers. Also, if you change the Zone 2 audio output, it will decide on its own to change the Main zone audio as well.