The USB having to be plugged in for the lights to work is for sure a con of it. That is absolutely no issue, as I can make it 12+ hours with quite a bit of talk time with this. The detailing upper laces section is poorly constructed with a plastic piece that can surely break easily. I am uncertain on whether it was caused by my sweat, any skin products like sunscreen, or the wipes Ive used to clean the headphones with. Its an actual house slipper thats basically a shoe. Your walking on clouds. I had my eye on these shoes for a long time and finally bought them. I don?t know the exact size of the band, and can?t find any information on it. It will still stay connected via the serrated plastic part that is used for adjusting the fit, but try to make it too big and itll fall off and hang by the wire. I wear 2x and bought 2x and it fit as expected.