These are okay. I like the fit... don't really like the material. I would recommend MAMA brand Nursing Camis from H&M over these and several other nursing tank tops I have tried. They're the only ones nice enough to wear alone, which is great for summer. These ones here (iLoveSIA) are my second favorite and are suitable for layering underneath clothing. The padded cups are totally weird though and if you're not careful, they'll make your boobs look like they're pointing in lopsided directions! lol. Just do yourself a favor and remove them. These tank tops actually work okay for shape without the cups. Some are terrible, making you look droopy or giving a uniboob. These ones give lift and separation.
I would give 5 stars if they were more of a cotton. The material just isn't as comfortable and they LOOK like an undershirt, so I wouldn't want to wear it would another layer. 5 stars on length and shape.