Keens are not sandals, but a hybrid shoe. They are very high quality, and can be used for hiking, watersports, etc., so they are hardly a flimsy sandal type of shoe.
That being said, hubby and I don't find them as comfortable as our Teva or Merrills, but our kids love their Keens! They wear them for at least 6-7 months of the year, so well worth it.
Tiger