I purchased my regular bra size in the front-closing model. Not only do the cups roll outwards (which makes the outline of your cups visible even in a sweater), but the straps are completely nonadjustable. See the picture of the woman wearing the bra, lifting the strap? If you can pull the strap that far, you aren't getting much support. The End. Seems a pretty high price to pay (literally) for a slight minimization of the amount of bra strap visible across your back (it doesn't even make that much difference). The better option is always a good fit! After all the hoopla I've heard about Spanx, I can only wonder what body type their products are designed to fit (since they can't be adjusted AT ALL).