I wanted a pair of shoes that were comfy for work, but that I could walk in easily.  I bought another pair of Ahnu, but they did not have the strap.  The size was a little big, and so it was very awkward to walk quickly.  I normally wear a size 10, but since my other Ahnu were a little too big, I figured I'd order a little bit smaller.  I love that they had it in the half size because they fit very well.  These are very easy to slip on because the strap actually has a little bit of elastic on the ankle side.  You cannot see it because they made a little "pocket" to hide it.  I can walk quickly in these shoes no problem.  And they go with everything I wear!!