Originally, my husband and I kept finding these small half sphere things on our floors. I would always get very itchy, irritated skin at night before bed, even with tons of lotion on. Only difference is, the exact same shoe cost 100$ more at the store. I needed to down load or reestablsh the Apple WiFi program to make sure eveything was up to the task before I connected the refurbished Apple WiFi unit. I sent these back. All in all an amazing device! Since the cold is pretty much here, I wear them often and like them a lot. it keep popping out. I even have a popsocket on the back of my iPhone and it still sits on the stand perfectly. I got this used, and Im guessing I know why the last person returned it - when I first plugged it into my headphones it sounded awful.