Gilt always seems to have a wide, stylish range of offerings, at very competitive prices. The website design is sleek and makes shopping online as painless as possible. I've also made several returns, and have always been fairly satisfied with the service, although shipping costs can be excessive from time to time.
Over time Gilt has expanded into food, babies, home products and more, each one offering the same high caliber products and amazing web design. Check it out.