I have 3 of these:
Mamiseta
and one of these in hot pink:
DeMama
And I HATE them! They are uncomfortable and very un-flattering.It looks like Im wearing a bib (in the case of the first one) and it makes my boobs look 20 times bigger than what they are! lol.They are ok for nursing in bed (which is why I have made them into my PJ´s) but they look awful to wear out kwim? As for the second model (the one in the second link),they are more comfortable,but ugly.Just not something Id wear.
I use regular shirts/tops...I even wear tight tank tops.Iv figured out how to NIP comfortably whilst wearing anything,so I wear regular tops and feel alot better.