I live in Birkenstocks (Birkis) year round.  I have problems with my feet (neuropathy) and Birkenstocks have always been the one shoe that fit and that I felt stable in.  This style has the soft footbed, which is very comfortable, and the colors are all great.  You can't beat the price.  They aren't leather on top, but unless you're planning on having your leather ones re-soled, its not worth the extra money to pay double for solid leather.  I bought one pair to try, and then came back to buy 2 more pairs.