Very cool concept, but more work needs to be done to put into action.
Great find are possible, but you REALLY need to be careful here - I tried on about a dozen things, and all but three had major damage (and really should not have been out for sale). Terrible staining, rips and frays, etc.
Sizing is a challenge as they are used items of a million different brands - make SURE you try things on.
Layout is totally disorganized. Guys, arranging by colour is not the most effective. As others have said, you'll find high-end right next to bargain basement, which means you need to search through every single item to find the treasures. For those who love the thrill of the chase, this place might be your heaven. For me, I found it irritating.
Staff were friendly although the so-much-cooler-than-you vibe was a bit much. One of the girls sitting behind the checkout was actually offensive, but the girl on the floor helping me out was great.