Oh the modern torture contraption. I will admit I liberate the sisters any chance I get.
I’ve been blessed/cursed to carry a good deal of my weight in my chest. But if I’m not carrying any excess weight, I have very little chest. Since I’ve been anywhere from 55kg to 115 kg (maybe more. At some point I stopped stepping on scales) I’ve had every cup size from barely A to double D. I can confidently say that the price of a bra has nothing at all to do with how well they fit or how long they last. I’ve had $5 bras comfortably hold up (Ha) for years and $80 bras give up in 6 months. At any size. If you do find a bra that fits and is comfortable, you better buy as many as you can possibly afford because next month they will be gone and you will never ever see that model again.
Aside from that, the bra guide is spot on.