The thing about this sandal is that not only is it extremely comfortable on the foot it REALLY helped my back.  I guess it is the structure of the shoe and it gets you higher off the floor, which if you stand quite a bit during the day, can play havoc with your back.
Since it is winter I need to look for one that is not a thong and so far there is not much selection.  Get moving FitFlop and make some more styles.