The only thing is that the description is inaccurate as it said that the button on the cord is a mute button. The material is pretty heavy duty; I drove at normal speeds and just about every day would drag it off the roof, fully packed, slamming onto the ground. Its not that smooth when using certain modes that cycle through colors. No pain at all with my plantars and quick break in period. Hergestellt ist der Schuh in China. Denn die eigentlich wichtigen und tragenden Teile sind aus Metall. I did not have to struggle with at all. DO NOT BUY THESE if you ever plan on getting a new phone or using more than one device. I waited before writing this review to make sure I had time for the shoes to break in etc. It is a fantastic book, bubbling and crackling with imagination and humour.