Everybody has different feet and has troubles with them. They do stretch a bit . Oofta! ?? Not sure on battery life as I?ve just got it and only used it a handful of times. I bought a different fitness tracker before this one and was very unhappy with the product. 99 but I do, sound can be very subjective. These remove both of those problems. (If your top rack has long items such as dresses it might not work) I like the design though.