Just opened the box and put them on.  I may never take them off.  I love my summer fit flops, but honestly enjoy the comfort of these MORE.  I am a perfect 9 in the thong, but got a 10 thanks to one reviewer's comment.
I DO wear socks and had to take that into account.  Even a thinner sock will not slide in the same as a bare foot.  They're perfect,  Got the Cherry Berry since I feared a Michael Jackson look with black against my grrrrr white support athletic socks, but may consider getting the black for 'dress' anyway.  The color goes great with jeans and I supposed just about any color since the shine makes it change colors a bit in different light. Now I think the red would be fun too... hmmmm can one have too many comfy shoes?