The cuff has met my expectations: it is strong, light and comfortable. My main concern was the "strength" of the scratch and the risk of dropping the phone such as high speed bicycle: no problems at this level even after several contractions of the biceps, setting never gave up. Very good quality / price ratio. Unlike other armbands, the GPS smart phone is very well detected in the running application use (as Endomondo). Only small downside, the slot to store keys is a little small, but generally, it does not take a big bunch of keys when practicing a sport ...