I don't know.
Most days, I dress like I crawled out of a rummage-sale refuse bin. Yet even *I* cringe a bit at wearing Mephisto Helens as lounge shoes, indoors. With a perfect pedicure.
(Yes, I've worn them on the street a few times, but it definitely did not look good.)
So, stylewise, I'm thirding what Suja and April said.
BUT: for the sake of young women's long-term podiatric health, I'm very glad to see such a foot-friendly trend.