I recently started jogging/ running again on a treadmill.  Was looking for a sports bra because regular bras cause too much bounce - it can be painful.  Anyway, i bought this bra after trying out several others (including the Fiona and Maia) at a local sports store.  I wear a 36d and this was immediately the most comfortable and supportive - and the most expensive of the lot!  Have used it several times while working out so far, going up to 6 miles/hr, and there is no bounce at all - everything just stays in place, like it's under lockdown of some sort. The support really is great.  Its def one of the the most expensive bras i have, but functionally it totally delivers.