I was happy to read that it runs small so I did get a half size larger and so glad I did.  My problem was that they are so slippery.  The first time I wore them I had to take it off and do Zumba in my socks.  I'm an instrustor and was excited to wear them, but NO WAY.  I've been wearing them outside to "ruff them up" a bit, but I'll have to go with a different style shoe just to be safe and not break my neck.  But it's a cute shoe, that's about all.