these are perfect for what I wanted, a versatile sandal/shoe and these fit the bill.  Just swing the back strap forward and you can easily slip into and out of these Crocs, and they don't fall off when your walking.  But when you know you'll need them on for a longer period of time, just pull the back strap over your heel and they stay on for a jog.  I would have given them 5 stars but for the fact that in PHX they make my feet sweat in the summer.