I just received the product, good quality, the iPhone 6 goes smoothly with Incipio's hull, very good point. Beware though, if you are relatively muscular and you make more vengeance 40cm, do not take this product, there is a good chance that you simply do not can attach it to your arm. I wanted to use not only for running but also to the weight room, but I think it could pose problems for the years causing heavy congestion biceps / triceps (including curl inclined). Be aware so before buying the product.