I just bought a pair of the black in this shoe and am really pleased with them. They are not completely "flat" but do have some support for the foot as well. I am giving them a "4" only because the part that goes between the toe is initially a bit uncomfortable but is softening as I begin to break them in. As someone else said, they are dressy enough to wear in an office setting and the top is just funky enough to look cute with flowy type skirts. I am probably going to buy the white as well.

On the sizing, I have a medium width foot, slightly wider across the toes, with a high arch. The band across the top of the foot fits exactly. If you sometimes have to buy a "wide" in shoes, you will probably want to think seriously about a wide width in this shoe. I also wear a 7 or 7.5 in most shoes and I bought a 7.5 in this and it fits perfectly. I have found that it is best to go with the slightly larger half size on most thong-type shoes.