I have no experience with it. I too was curious so I emailed Dave at Oware. From Dave:
"The fabric is 1.1 oz finished weight (per yard squared). It is a DWR fabric like the Quarktex, but not as hot calendared and made of a heavier 30 denier thread. The Quarktex is a 20 denier thread.
The properties of the two fabrics would be similar with the Quarktex being slighly[sic] lighter, more wind and water repellant."
Looks like a bargain especially if your quilt will be used inside a bivy to stabilize the air and protect from water.