And they're not ballet flats.
I got them a week or so ago, and I've worn them on a few long walks and to Zumba class yesterday (my first time - SO MUCH FUN). I would say they aren't for everyone. I have pretty flat feet and I prefer a really minimal amount of support. That's why I wear ballet flats and flat as a board sandals all the time.
These shoes have a little bit of support in the arch and a bit more through the heel. But they're not bulky, heavy, and they're pretty soft and flexible. I love them for general exercise use.
Plus they're pretty swell looking.