I love this shoe!  I didn't read the reviews until after I purchased and was scared that they would be too small but they were not.  I can usually wear a 6 but 6 1/2 is my true size so I ordered a 6 1/2 and they fit great.  I love the way they are made, I don't understand what people are talking about toe cleavage?  These are great shoes. Whether you need to go a size up or not just depends on the person I guess.

Update: I actually did have to go up a size because the pair I had were rubbing the back of my foot so bad that it was creating a blister.  I now have about four pair of these I love them so much (gray, gold, teal, and black patent) you can't beat the heel size for everyday wear.