I think they are old hat now and New Yorkers and celebs like Gwen Stefani are more interested in the shoes designed by ex-orthopaedic surgeon, Taryn Rose. Her shoes are now available at Harrods for about �200. I quote from todays Evening Standard;
'Her shoes leave room for toes to wiggle, they're light, are cushioned with medical-grade shock-absorbing material and have an arch support to help redistribute pressure.'
I bet they'd still look like housebricks on my feet, though.