I have D-cup implants.  While I don't have a problem with sagging, my breasts are quite far apart so I needed something to pull them together without the confines and tightness of an underwire or constructed bra.  This item is perfect!  It's comfortable as long as I'm not in the heat too long...silicone and sweat just don't mix.  I took others advice and ordered one size larger and it's a good thing as I think I got a perfect fit.  I'm sure some women will not be comfortable with the feel of the sticky silicone against their skin but it's just a matter of getting used to it.  I've worn the silicone nipple covers for years whenever it's too hot for a bra so it's not a biggie to me.  Overall, at such a low price, I'm extremely happy with this bra.