These shoes are amazing! They are very comfortable to wear, but after about 4 hrs the ball of my foot hurt a little (nothing a gel insert won't fix).  I normally wear an 8 1/2 to 9 and I bought a size nine.  They are pretty true to size, but I think I would've liked a more snug fit with an 8 1/2.  Over all fast shipping, good quality, and super sexy heel for sure!
*EDIT:  After wearing these around for a couple of weeks intermittently, these have become one of my most favorite pairs of shoes! Comfy, stable, and the only ONE downside is that the material on the heel has been roughed up kinda easy, but I don't care they are fabulous!