I've tried them ALL - Dansko, NM, Crocs, etc, etc, etc. And then I found Ortha Heels. Ahhhh. Relief for these famn near flat feet!
Go to their webiste and check them out.
I found these by accident. I was at my parents house and slipped into my mom's flip flops while I took out their garbage. Her flip flops felt amazing on my non existent arches. I then wore them for the entire weekend and couldn't believe how great my feet and calves felt. She told me how they've worked wonders for her, too. So I got online and ordered their "walking shoes" - OMG - heaven. I've only worn them 3 times (or 36 hours) but so far SO good.