I recently ordered a pair of the Daytona Sandals from Keen and I could not be more happy with them.  They are very firm with little cushion but they actually felt great all day.  I wore them for 15 hours straight and did a lot of walking and my feet did not get sore at all.  My feet stayed cool and the sandals felt snug on my feet.  You can tighten or loosen with the bungee depending on your need / preference.