Sorry, absolutely HATED the Niles. I took two pair of Payless AIRWALKS (like the beach style) and one pair of Niles. The one day I wore the niles, I had blisters, hotspots, unbelievably sore heals...you name it. I was not happy. The Airwalks were WONDERFUL, though. My feet were so happy when I wore those. I have since purchase two pair of the Airwalk flip flops, and While I can't attest to their comfort for WDW,I can say that I have worn them all day, every day at home and they are great.
Hope that helps!