I have PF and heel spurs and my FF are the only shoes I can wear for long periods of time/distance without pain. I have 3 pairs of flipflop style and one pair of the clogs for the colder weather. The women who work at my kids' school worship these shoes as much as I do and we all watch sales for one another. I have only purchased them locally (last year's model=very reasonable price).
I never in a million years thought they would do anything for my 'shape', but wearing them means I can always walk as far as I need to and that makes me pretty happy! I have worn them the last 3 Disney trips and never regretted a moment.