I think all of these other reviewers need to get over themselves. For overall selection of top-quality fashion in Chicago, Barney's is it. There is the occasional salesperson with an attitude, but overall I have always found them to be very outgoing and helpful, especially on the 1st and 3rd floors. Yes the prices can be pretty steep, but watch for sales and you should be able to do fairly well considering the quality level.
Pros: Selection, Design, Atmosphere
Cons: Somewhat Pricey