I also really like the armband itself. It's very thick and although it's stretchy to customize to different arm widths, it stays up well and the velcro is very high-quality to keep it in place.
If you already have an iPhone case that you like, this armband can potentially be a hassle - having to remove your case, put on the iArrow case and inserting into the armband. However, after testing it with a regular iPhone case, it fit pretty well albeit a bit snug in the armband holder. So you might just be able to use your regular case with it. Otherwise, use the iArrow case as your everyday phone case; It's sleek, protective, and black so it matches anyone's taste.
Just to reiterate, the iArrow armband was specifically created for the iPhone 5 and 5S. It won't work with the 5C as far as I have read from other users. But if you have a 5 or 5S, this armband is a great accessory.
I received one or more of the products mentioned above for free using Tomoson.com. Regardless, I only recommend products or services I use personally and believe will be good for my readers.