Very comfortable.  Have just worn for a couple of days around the house...no long walks yet.  My only COMPLAINT is that back strap adjustment doesn't allow me to tighten as much as I would like.  There is only about 1/2&#34; of adjustment room, but at the tightest adjustment foot sits at the very back edge of the shoe and I would like it to sit more forward.  (I have had this same complaint on two other Clark's sandals.  I would love to see a one-inch adjustment for the back strap).