Well, mine came in the mail yesterday. It's 12.65 oz on my scale, not the 11 oz advertised (stuff sack and repair kit is another 1.15 oz). Haven't done any more than lay down on it; it seems comfortable, and yes there is the sound of potato chips. Remains to be seen if I can stand that or not.
I'm wondering what/where the extra 1.65 oz is...I guess if I like the mattress, I'll just live with it, I'm not that anal about 1.7 ounces. Of course, I could add another couple of ounces and get the Xtherm, then.