I found that the cuts in the elastic that the maker creates in the bottom elastic of the bra really compromised the integrety of the bra. I hated it.

Now, I take my well-fitting sports bra, and the monitor without the strap, lick the electrodes (yes it really does help transmit better, just like sweat does) and stick it *above* the girls (I'm a 34C) just under the uppermost edge of the sports bra. Looser bras = too much jiggle when I run, so I end up with a nipple monitor -- still reads HR but looks pretty funny. When I ride, it stays in place, reads well, I have no extra strap, and the bottom elastic of my bra does what its supposed to -- keep me in place. I've done this for two years and am thrilled. I don't know anyone else who does this, but for medium to larger busted women whose bras do decent compression/snug fit I think it'd work like a charm... does for me!