I have wide flat feet with plantar fasciitis and I read that Birkenstocks are great for feet pain. I am a size 6 and according to the size chart, I should wear a 37.  I found that the Gizeh ran a little big because I had to exchange the 37 for a 36 which fit well on me.  I read tons of reviews about how comfortable these sandals are but to be honest, they're not THAT comfortable.  The ridge on the sole in the toe area bothers me.  I also read that it takes a few wears before the sole conforms to your foot but that ridge still bothers me after 3 months of wear.  I walked about two miles one day last week in these sandals and ended up with a blister where that ridge was rubbing against the bottom of my second toe.  The sandal is fine for light walking.  I haven't noticed any conformity to my feet yet.<br /><br />As for the style, these are pretty popular as I've seen then on several women while out and about.  They are cute with shorts, maxis, casual skirts, and casual pants.  I'll keep wearing them for the rest of the summer but not for long treks.