Shop for Groceries Online?

This ad came in an email late last week and caught my eye.
I haven't been to Amazon myself to do any price comparisons with local grocery stores, but with free shipping...
Amazon Grocery offers over 22,000 non-perishable items including some of your favorite brands, shipped to your door, just like any other Amazon.com purchase. We've also recently introduced the Subscribe and Save program which is a great way to save money on items you use routinely. You can sign up for routine convenient delivery of products such as coffee pods, shampoos, laundry detergent or diapers and receive a 15% discount off Amazon's already low prices and free shipping on these items. The 'Subscribe and Save' option sure sounds convenient - combine it with free shipping and 15% off? I'm heading that way for a look!
(I didn't even know Amazon had groceries for sale...
this is very handy for a busy grandmother!)