I read a lot of the reviews that said these run small, but they fit me the same as all Sketchers.  They are true to size on my foot.  As for all of the "fitness" claims... I haven't noticed any of them.  I don't feel more fit from wearing them, which is why I only gave them a four star because I think their advertising exaggerates their fitness claims.  Now, having said that, I still gave them a four star because they are probably the most comfortable walking shoe I have ever worn.  I had to be on my feet in the kitchen all day cooking.  Normally, my legs would tire, but not with these shoes.  They are great!  I would purchase them again for the comfort alone and I am considering purchasing a more dressy Mary Jane style.