I bought these to enhance a Laura Croft costume and was very disappointed that they created cone boobs.  I cannot wear them on the bottom side of my breast and had to shift them upward to avoid having wholly misshapen looking breasts.
It is possible that my breasts are simply too large for this product and I acknowledge that, which is why I rated them 2 star and not 1. Perhaps it works for A-B range, but if you are a C+ (I am a small D), you will likely run into the same problem.
On the upside, they feel neat to the touch and once they warmed to my skin I didn't notice they were there. On the downside, they shifted all night and I had to readjust them several times. Perhaps if they were seated below the breast as intended this problem would have been averted.