After reading many reviews on this item I was so excited to try it out!  I ripped open the box yesterday and tried it on in front of my bathroom mirror.  I gave it a quick "jump test" and within 20 seconds I had to take it off.  The shoulder straps dug so hard into my shoulders that it felt like knives.  My breasts bounced around so much that I almost knocked myself out.  I am usually a 42F - so - I thought I'd play it safe and order a 44G.  The band fit pretty well - but I was busting out the sides of the cups.  I have to wear 3 bras when I exercise - and I was SO looking forward to getting this one because of the reviews!  I don't know what bras the reviewers tried that gave them such great support - it couldn't have been this one!