Works, but not worth the price
I purchased 3 of the breast feeding bras from motherhood when I had my son. I only wore one of them once. They are not extremely comfortable and it can be a little bit of a chore to unclasp compared to just wearing a sports bra. Also, the material that sits under the moveable piece does not keep its shape well. Over these extremely expensive items I would recommend a comfortable cheap sports bra that can just be slid up one side at a time. They are less expensive, more comfortable, and more durable. The other problem with breastfeeding is the fact that breasts change sizes so often. This can be an issue in something with actual cups, where as in a basic sports bra it is all just one large area that can be more accommodating to whatever size the breasts happen to be on a given day.