After reading reviews here on Amazon, I ordered one band and cup size down (I wear a 36D but bought a 34C) and its perfect, snug but still comfy and I can run in it.  I love the more modest scoop neck and the materials are soft enough for sensitive skin. Also, it separates a good bit especially for a sports bra so there's no uniboob. I'll probably buy this bra in other colors. If you don't do high impact sports you could order this in your regular size and it would probably be even that much more comfortable.