These are the most comfortable shoes/sandals I've ever owned.  Better than Teva, and much better than Vionic, which pushed my back into a very uncomfortable posture.  The arch support is perfect, and the entire sole is soft, but not mushy under foot.  I typically wear a 9 Wide to accommodate bunions, hammertoes  and arch support issues, but that often leaves the shoe somewhat long, and in the case of sandals, floppy.  As many reviews suggested, I sized down to an 8 medium, and it fits perfectly.  I am very happy!!