Holy Toledo!  I am 54 and have never owned a pair of Birkenstocks.  I have truely been missing out - I have falling arches and plantar fasciitiis and these sandles feel fantastic right out of the box!  I had no idea they felt this good OR that they have so many styles!  I will certainly be ordering another pair of something I can get away with wearing to work as soon as I get the money.  It's taken me this long to get a pair because they are so expensive, but wow! are they worth it!