I love my Ryka Revive shoes; I've owned three pairs so far.  My only complaint with them is that they wear out too fast; after only 6-8 weeks, there are holes in the mesh at the toes.  I don't buy them too small, it just happens.  They are extremely comfortable on my flat feet.  They have a boxy, roomy toe, and smaller heel, which is similar to a combination last, for those of us with narrow heels and wider toe areas.  The shoes in this article look great; I was anxious to get them.  They are very lightweight, but I knew the second I put them on I couldn't wear them, due to the higher arch, and rocking action of the shoe.  For flat feet, this is painful; with a very small arch in my foot, these felt like I had hard rocks in the middle of my foot.  I immediately packed them up and sent them back.  If you have a higher arch, they would probably feel okay.  In a nutshell, they are a very lightweight, rocker-style shoe with a higher instep.  In case you don't know, Ryka's are only made for women.  If you haven't purchased Ryka's before, they generally run small.  If you wear a USA 8, try a Ryka size 9.  And, as I learned here, the feel and fit is not universal among the brand.