From what weve been told from other people in her industry and related industries (nurses), its recommended to replace your shoes every 6 months or so. Within a week the battery life dropped significantly. The Anker was by far the least impressive. I an dont know why she cant see it i mean its RIGHT THERE but NOOOOOOOO for some reason it just sits there for about 2 or 3 days until i have to say "youve got mail" in my best A. In the house. For the same money or just 5 to 10 dollars more its possible to get an Anker Soundcore P2 or Boltune earbuds, they support at least AAC and even aptX. Mini USB is on its way out, but I guess the gold plated connectors might justify the slightly higher cost - who knows! I have to return both due to narrow heel. The pants at the waistline is very small I would say is xxsmall in size. Wall installation would be best but if installing on door (probably not recommended by manufacturer but worked great for my needs) be very careful not to drill all the way through the door.