This is my second prAna yoga strap.  I got the first as a gift and loved it so much, I didn't want to be without it when using my backup mat.  I feel bad buying anything but the cheapest thing to carry around my yoga mat, but having suffered with weird scratchy ones, this one is awesome!  The velcro is not so noisy that you feel bad bringing the whole contraption into the yoga room.  Most of all the strap is soft, soft, soft and a joy to carry around.

The only thing to be aware of is that it doesn't play nicely with thin mats.  I have a super-thin Lululemon travel mat which rolls up tiny -- it has stymied every mat strap I've ever bought and this one is no exception.  It just barely works, but the edges of the velcro are hanging on for dear life.