The first thirty seconds or so, I didnt see anything but the power light come on. I was willing to let it go that my left heel is forced over to the side at the heel so that it overlaps the inside edge of the sandal instead of sitting centered in the heel bed of it, but this latest defect has me here tonight leaving a review of one star. Wow, I didn?t expect such fast delivery! I dont consider this a negative, get a set of longer hex keys (they seem to be used everywhere) and that should be all you need. Keeps AirPods well protected. its very lightweight and feels fragile. Honestly this is only my 3rd different set of earbuds, but so far they seem to be the best fitting and most comfortable of the 3. It is easy to assemble and attaches snugly to a tow hitch. The overall sound quality is good. With a little ingenuity they could put in a comfortable molded insole and make these so much more desirable to wear.