Do they run big or small, or pretty true to size? I generally wear a 7.5M. I am going to a conference in Orlando next month that will involve a lot of walking and I am thinking I need a new comfy pair of shoes. I have been looking at the Keen Sydney Mary Janes. Does anyone own a pair? How do you like them?

It looks like shoes.com has the best price at $79.99 plus 20% off for using Visa, but alas, they don't have my size! Any other deals that good right now?