YSL’s cutting-edge fashion is bold, sophisticated, and subtly chic. Located on famed Maiden Lane in Union Square – once home to crime and prostitution, pre-earthquake – now is home to the house of Stefano Pilati’s designs. Reflecting the clothes, store design is strong and modern made of sleek onyx, sexy black lacquered walls, and simple crisp white chairs. Inside sits the collection of handbags, shoes, eyewear, and ready-to-wear for men and women. Merchandise is expertly displayed and staff is kind, making for a pleasant experience all around. Of course this is SF and most edgy pieces from the collection are not available at this location.