Of all the services to complain about, one-click checkout should be near the bottom of the list. For the users, it provides a great UX and prevents the need to

Of all the services to complain about, one-click checkout should be near the bottom of the list. For the users, it provides a great UX and prevents the need to give your personal/CC info to every random site that you wish to purchase from. For the business, it can significantly improve conversion, reduce fraud, and reduce eng time for payment integration.