My only complaint if it is one, is that the assembly instructions arent really very efficient. OH, if you do have any trouble with the manual, watch my video on you tube, (a lot clearer picture) or e-mail positive vibes inc. They were so much more comfortable than my old ones! for the month that it actually worked. I didnt realize until I bought a different type just how much more comfortable these are than any others Ive used. I had my big toe joint fused and was told by my Podiatrist that Dansko is a good brand of shoe to wear after my surgery. So this is good for charging the laptop, but I cant leave it plugged in while using it. Pain in the behind to pull powerbeats apart, but these saved me from having to replace them entirely. This case exceeded my expectations! Testé sur une moto roadster sans aucun carénage à 130 km/h, le téléphone ne bouge pas et pas de vibration parasite.