I've got an Aeron Riding Halter. It is OK, but nothing special. The same basic design is being sold by a number of people. At $35, it is overpriced for the market. I now mostly ride her using a less expensive halter with a thinner rope, and I can't tell any difference in effectiveness or durability. Please ignore me...this picture was taken shortly after I took up riding. Bad as I still am, I'm doing better than that.
Because of this thread and my constant search for a good hackamore, I'm actually making an Indian bosal today. Measured my horse's nose with a coat hanger (that he kept trying to eat), and I'm about to leave and get some good rope from the store. ;)