I have been looking for something like this for quite some time - for extra coverage under V necks as well as button down shirts. I have the Small/Medium size. The front of the garment is tall enough for the coverage I wanted (7.5"), and the lace is pretty and stretchy. The back of the garment is not lace, but it is still stretchy and comfy. The back is about the same height as a standard bra band (2.5")- it's not tall like the front, but this is fine for me. This garment is pullover so there aren't closures, but I like that as well.
At the top corners of this garment is a hook similar to the hooks on the ends of detachable bra straps. This is meant to hook around your bra strap and it will rest where your bra strap connects to the bra cup.
This is the reason I didn't give it 5 stars - I actually wanted to adjust it up a little higher to cover more. To the manufacturer I would recommend optional straps for this reason. So, I'll only wear this with the bras I have that happen to have taller cups, like the one in the picture. Other than that, it is a great product. I bought 3 of them.