Need to Cancel Amazon Prime?

Another reason to appreciate Amazon.com. . . I signed up for Amazon Prime recently to get free shipping for my Bibliophile Husband's most recent purchase. However afterward I  forgot to cancel it and when a month passed I noticed a $79.00 charge on my bank statement. A little research showed that if you cancel the service before using it they will refund you the entire amount. I did, they did, and within 24 hours the amount was posted (in the deposit column this time) to my account. Kudos to Amazon for great customer support!