As other reviews mentioned, I'm not sure you should wear it the way the model is wearing it. I've found that harder edged items (like credit cards) kind of cut into the sides of my boobs when worn that way, but if I wear it pocket-side out it is okay.

I didn't know it at the time of purchase, but the pocket folds over the top and is secured with velco.  Good to keep things secure (or if you intend on hanging upside down?), but it makes it awkward trying to extract cash or whatever you're carrying discreetly.

It is well made, and can hold several credit cards and dollar bills without a problem. As for the insulin using reviewer....you gave it a bad review because it wouldn't hold your medical equipment?? It is specifically advertised to hold credit cards, cash, driver's licenses, etc. which are lightweight items - not medical stuff.  If you attached heavier items to your bra (regardless of whether the container was 'well-built' or not), your boobs would be resting on your stomach because you'd be pulling your bra down with heavier items.

I gave it a 4-star review because it does what it's advertised to do and will hold them securely.  Although, because of the awkwardness trying to remove and return items to the 'Secret Stash', I would recommend it more for holding personal items on a "just-in-case-I-might-need-them" basis, like to a Wedding Reception or some other instance where you want your ID and some emergency cash on you.  Using it for a day of running errands around town probably is more of a hassle than carrying a purse would be.