The sneaker is super cute, but other reviewers were correct -- the arch support is too far back. I love Vionic shoes and live in my Vionic flip flops in the summer.
Also, it's hard to find the right size in these.  In other Vionic shoes, I wear a size 5.  But in my running shoes, I wear a size 6 in Asics.  I bought a different pair of Vionic sneakers in size 6, but they were too long.  So I purchased these in a size 5 since they don't offer 5.5, and it fit just a little too snug.  I guess I have to stick with Asics for sneakers, even though they don't usually have as good of an arch support for my plantar fasciitis.