I followed the instructions to the letter, and the product still wouldn't stay stuck to me once it was bearing weight.  And, er, on me, there isn't a whole lot of weight for them to bear.  I had to return them (and, to be fair, they handled that well, even though they couldn't possibly have resold the open package).

Also, as another reviewer mentioned, they do nothing whatsoever to conceal the nipple.  Rather than buying this and pasties, check out the NuBra adhesive bra.  With some practice and careful positioning of the cups, it's possible to get a lifting effect from the adhesive bra.  Combine the instructions for this "lift tape" with the proper care and positioning of the NuBra, and you can get a much better effect that preserves your modesty and actually sticks.