Amazon's commitment to providing a consistently excellent customer experience, something they've learned from the Zappos acquisition, is leading to its continued success. They're making consumers' lives simpler and easier, saving them time. They're gaining "customers for life."

Conceptually it's a great idea; however, the execution must work. I spent two hours this past weekend trying to buy something from UA and linking my MapMyFitness and MyFitnessPal accounts. Ultimately to no avail. It'll be interesting to see if UA can leverage the data they get from their fitness apps to provide me information of value that will earn my trust and show they care about me as a customer. So far, all I see is they want to sell me subscriptions to their apps.