I also had difficulty with shipment and the company was not helpful I read somewhere it sounded for some users. Unfortunately I had to return because my feet are too narrow for the front. This concept is great however a lot of the features require you to pay a subscription fee. I love the crisp, clear highs and the simulated bass sounds as well. No breaking in these shoes. Sound quality is decent with good bottom end. Looks normal at first but unable to use the screen while charging. The first Pair was too small and I ordered a second pair which I got yesterday. That doesnt seem like much but having the tires elevated makes cleaning under the bikes very easy and convenient.