Easy, Fast, and Convenient for Gift Cards with Change
One of the best features Amazon has - reloading as little and as much as you want, in exact change.  I often use this when I have gift cards I receive that has a minimal amount left that wouldn't be easy to use in person - and rather than trying to explain in person to a cashier and make two separate transactions, I just add it here.  Easy, fast, convenient.
Rating: 5 stars