I bought the Ryka, Studio D shoes for my Zumba class that I started taking a month ago. Amazon's price was very good in comparison to other sites and they shipped really fast! I wanted a good shoe for a reasonable price. I received them right before I attended my Zumba class today, and I was very pleased!!!! I took everyone's advice here and went with a half size larger than what I normally wear which is an 8 and I'm very glad that I ordered the 8 1/2. I do have a wide foot, but a narrow heal. So, my feet slip out slightly at the heal while dancing. I'm not sure if its a matter of getting used to and/or perhaps I need to play with the type of socks I wear. However, overall, I'm satisfied with my Ryka shoes. Thank you, Amazon!!