I am a flat footed neutral runner. I have worn the Dyad for about 7 years and it has worked for me. I would go through 2 or 3 pairs a year. They used to offer them in 2 colors (a light color and a dark), and more recently have only been offering the dark. Also, the Dyad 9 just wasn’t as comfortable as past models. This winter I purchase a pair of Asics Gel Fortitude. They seemed to be working pretty well for me, but when I increased my miles (I was training for a Ragnar Ultra), I started having calf problems. I didn’t make the connection to the shoe until race day. My calf started locking up during the first leg, on the suggestion of a teammate I tried a different shoe. I brought an old pair of the Dyad 9’s in case my feet got wet. Over the next few legs my calf improved, convincing me that it was related to the shoe. So I’m done with Asics, so I need a new shoe. The Dyad 10 in their ugliest shoe yet. I’m probably going to just have to suck it up and buy it. I am interested in the New Balance 840 but am nervous about trying something new. Are there any other Dyad users out there that have tried other shoes? Have any other worked for you?