I've only watched one episode, when I was stuck babysitting my little cousin and had nothing else to do. It certainly held my attention. I think it's interesting to consider the role clothes play in revealing a person's self-image and creating the image they present to the world, and how simple changes in wardrobe can modify and change that.
On the other hand, some of the negativity, fashion dogmatism, and criticism made me wince. On the whole, it's not a show I would watch often, or ever, ever, choose to be on!