Easy to use
I bought these when I was getting lots of Amazon gift cards.  I don't get Panera often because it's kind of expensive, but I could add these to my Panera account and combine them if necessary.  I was also able to get one for my father, who goes there occasionally, too.  The good thing is that when I didn't have Amazon Prime, these would qualify for free shipping.  I'm not sure if that's still true.
Rating: 5 stars