Most usable e-commerce sites: Amazon, American Eagle, Banana Republic

Citigroup rated 44 retail Web sites, judging sites on how easy they were to use, visual appeal, ease of checkout, merchandise assortment, delivery, return options and price. Amazon tool the top spot, followed by American Eagle Outfitters, Banana Republic and Talbots. Costco, CompUSA, Hot Topic and Kohl were at the bottom of the list.