I have been a fan of Supre after getting to know the site through a friend.
My first purchase was a disaster - the items I ordered in my size were too large. For the next few purchases, I was very careful and went a size down.
However, I would say that the items aren't exactly worth the price that you pay for. For AUD$30, the quality could be better - the straps had to be handled carefully.
I'm always a fan of the sales corner, as they always have cute clothing like shorts and baggy tops that I always use as PJs, all for only AUD$5 each!! That's something to look forward to when you are shopping at Supre :-)
The free shipping that they offer currently is for orders that are over $100, and only valid for non-sales items. Do remember!