This is anything but seamless. As soon as I saw them slide out that webview with the vendor's site I nearly vomited. They had a chance to make buying items that users like so much more painless, but they only delivered a partial experience. I don't want to bother with creating an account for every random vendor, typing in my CC info, and then having to rummage through emails to get tracking info. This is a great idea, but the execution leaves a lot to be desired.