Belkin, as far as brands go, are pretty reliable. With this armband, i am pleased to say, overall, once again, they've made something great!
First of all, the number of shoddy items relating to iphone 5- especially workout armbands, is quite shocking. the amount of money you spend on an iphone, you would at least adopt a similar mindset in selecting the adequate apparel for runs / workouts to protect it. With the 'Belkin Neoprene Profit' armband, security, comfort and ease of use have all been approached rather successfully.
-With reference to this 'patent pending' clasp, it simply implies that a fold over plastic clasp clips the armband in place, rather than velcro or other fixture wrapped around your arm. while this a decent feature, it may catch the skin slightly, depending on how tight you intend to wear it, however, with an iphone strapped to your arm, you will want it pretty damn secure! The 'window' to the iphone is clear and does NOT scratch easily. Also, there is an earphone jack cutout in the correct spot for iphone 5, as well as a protective cover which tucks in over the iphone to completely seal it and protect it from the elements.
-The only minus with this product is the tightness. while there is a release catch so you can extend the armband to a shwarzernnegger circumference, you cannot tighten it any further. this may not be an issue for anyone already engaged in gaining muscle strength in their arms, however, a new start may find it slack.
Would definitely recommend, great product, well made, and well worth it.