definitely a good choice. Now I got the M9 size and it perfectly fits. Recap: The shoe is nice, but for a person that wears a wide, this medium shoe - that is a relaxed fit - wont work for me in any size. Just received my light literally 5 minutes ago and it doesnt even look like it has a USB port. Buckleis are easy to adjust. I love the product and would say its definitely worth purchasing over the cheaper, thinner looking wall mounts, especially if you have a larger bike. They tend to fall off whenever I do some high intensity workouts. just a shame the boots didnt live up to expectations (and cost). In summary- for a fraction the price of AirPods, the Duet 50?s are a serious option for anyone who cares about sound quality and controls and doesn?t want to hop on the AirPods bandwagon. Our S9 with Otterbox Commuter case fits very snug in this holder.