I've made 6 separate purchases from them in a course of 3 years, and I've never experienced a problem. The size chart is always spot on, they have an excellent selection to choose from, and the quality of the clothes has exceeded my expectations. This is my all-time favorite place to buy clothes online.
People have mentioned the shipping costs, and I'm a little bit confused? Shipping usually costs a lot... That's the deal with ordering almost anything. But it's not hard to qualify for the free shipping, because these are high quality clothes and therefore a little pricey-- but worth the cost.
I have no experience dealing with their customer service, however, so I can't give any feedback about that.