They work just fine, no moving parts, so nothing much to go wrong. You can usually find me in orthopedic-looking "granny" type shoes, even though there is nothing wrong with my feet- Im a young, healthy person- I just REALLY like to be comfortable. absolutely love these shoes. The box they came in was gorgeous as well as the shoes. They are the best fitting shoes and are comfortable from the first day and get even better day after day! Very nicely made. 5 and got the 8. Its a good value for money, it is sturdy, it looks good, assembly was simple, hardly took any time, little disappointed in the packaging. They don?t work anymore for me, really badly made and shippers material. When connected to 2 bluetooth devices, it will automatically switch to playing whichever device you most recently started audio on (while pausing the other one).