Why can’t people get it into their heads that “flattering” isn’t a factor some of us take into account when we buy clothes? How hard is it to understand?
What the?! 
It's been pitched as 'universally flattering'!
That's kinda the entire point that women are rushing out, en mass, to buy it.
I'd never heard of it until this thread. But from this thread I've learnt that it's known as The Dress, is universally flattering on every and any shape, has been repeated by Zara twice, has its own Instagram accounts, there are photos of groups of women in it, and people are being made fun of for wearing it in national newspapers.
So I do a search on it, all expectant, and up comes ... that? 😳
Any-climax doesn't begin to cover it.