Eventhough Bezos is obsessed with good UI's, Amazon has one of the worst user interface. I have observed many people have trouble even logging in to buy a book! The good thing, though, is that these issues are not impossible to solve; implying that Amazon has much more potential than is currently presented.
http://www.fastcompany.com/magazine/85/bezos_1.html
Eventhough Bezos is obsessed with good UI's, Amazon has one of the worst user interface. I have observed many people have trouble even logging in to buy a book! The good thing, though, is that these issues are not impossible to solve; implying that Amazon has much more potential than is currently presented.