The sides are good support and a good feature for disguising any skin sagging under the arms -- why don't more bras have this feature? -- but the fit is too tight.  I wear a 36B and the medium size is tight around the circumfrance and the straps are not adjustable on this style, so by the end of the day I want to rip it off.  Plus the hooks in the back are an odd width so the average bra-extender doesn't fit.