I get a lot of use out of this slip! I love the way it feels.... as someone else wrote 'it doesn't make you feel like a sausage in a casing'. Although it is lightweight it is still quite powerful. I am a sz 14/16 and I wear the XL. The ONLY thing I don't like about this item is that it tends to ride up a little if you are walking much or using stairs. If they made it just a little bit longer, it would be PERFECT.
I don't wear a bra with mine... I use those tape bra things. They hold me up while the slip keeps me in place =) (I am a full C cup)