Women's garments are difficult to size and intimates, underwear, foundations, what ever you call them, bra, panties and the like are hard to fit, and even with measurements, there is still guesswork.
Some brands fit one way, other brands another and there can be significant't differences from one model to the next as well as from one year to another.
I have found it is best to GO SOMEPLACE IN PERSON to be fitted and to try some brands and styles/models. THEN go on-line to find better pricing or greater range of colors.
I have recently purchased a couple items for a formal dress from them for first time. I allowed plenty of time to look elsewhere if I needed to do so. I am happy to report that I am satisfied with the items I ordered.
I know not everyone has had the same experience, but some customers do receive what they ordered, in the proper size and are happy with it.