I love them, too! I've attached one to the longer key strap for my keys, which isn't perfect but works well enough for me. Having the different fabrics in the straps, as well as the pouches, makes a huge difference for me -- I can't see in the dark, so I now don't have to pull random things out of my bag for minutes at a time.
Sorry I've been out of town for a while but I just wanted to add my thanks and congrats-- the plum keystrap looks great and I really appreciate the thoughtfulness of not only producing it in response to request, but of sending along a complimentary one (not to mention the FOT bag, which I was unreasonably happy to receive also).
A belated happy new year to all!