As a large cup, smaller gal, I had one heck of a time finding a nursing/sleep bra with my first child.  I just made do with regular bras and ended up nursing only a short while.  I am not pregnant w/ my 2nd with just a little more time to go.  This bra will serve me very well as a sleep bra now and then as a sleep and nursing bra (even though the cups don't open up, the wrap front will be almost as good) after baby is here.

Size seems to be spot on.  I am a 34 F right now, so the cups are slightly big, but once I have the baby and the milk comes, I'm sure the F/G size will be perfect.