May be perfectly fine in smaller sizes for smaller frames, but for a larger body and large chested woman, this will not provide adequate support. The front is fine (although size 38H perfect fit with other styles of bras did not translate into a remotely decent fit for this bra), but the back had very skinny straps that provided no anchoring support at all for the weighty chest in front (2 0.75" straps with 2 hooks each, one around the back of the diaphragm and a second which joins between the shoulder blade to create a racer back). Combined they do not provide the necessary support and if you are not toned at all, this creates very uncomfortable bulges. If you are in this size range, I would highly suggest picking something that has a wider strap across the back (at least 3 inches minimum) to provide a proper support for the weight in front. Despite already having done significant research before buying this product, I will be starting over in my search.
Shock Absorber Response:You should try going up a size. Perhaps this will allow the bra to fit properly and not show bulging in the back(which there shouldn't be). The bra needs to fit snug, but not too tight that it doesn't allow proper coverage and support. The racerback design should hold you in place. Both the straps and band are adjustable so may be tailored to support sizes up to a 40HH. If it's not the size that is an issue, then it seems like the B4490 is not the bra for her shape. Another option would be to try the D+ Max Support Bra which is available up to a 40H.
Shel from Edmonton, Alberta, Canada
Average Height (5'4"-5'8")