These shoes are fun -- I have the gold ones.  They are lightweight and fine for the beach or pool (they are flipflops, afterall), but also so much more -- because they actually look like sandals, I can even wear them to work.  I wear them with shorts, with skirts, whatever -- very versatile!  I wore them all day while taking three kids around an amusement park and they were very comfortable -- because they are so lightweight, they don't pull or rub.  I am very pleased w/ them.  I followed the recommendations other people have made on sizing -- go one size down for best fit.  I am typically a 37 in Euro sizes, 6.7-7 US, and I got the size 35/36 which fit perfectly.

Run big, I bought a size smaller than I normally would.

I had read a review on this shoe before ordering it and that person said the sizes ran big so I ordered the next size smaller than what I usually wear.   That worked perfect,  toe to heel shoe fits wonderful..  The problem is the straps that come out of the sole to go around your heel.  They are spaced to close together so every step you take you are walking on them.  After about 2 hours I had some nasty blisters on the sides of my instep!!  Very painful!!

The rubber is soft and feels great under foot, but the sizing is off.  I already have a big foot (41/42) and when I put these next to the regular 41/42 the foot bed is somewhat longer and the strap a little loose it just feels big and makes me wonder if I could have gotten the next size down.