Just bought these sandals to take on my honeymoon and they are hands down the most comfortable flip flops I own...and I own a lot of flip flops! I'm tempted to buy another pair as the electric blue is a rockin' color but doesn't match all my outfits. ;)
The only drawback is the yoga mat fabric seems to absorb water. After a day on a scuba boat and a couple dunks in the ocean I was squeezing water out of these things for hours. They eventually dried out fine and look as good as new.