Amazon Pantry seems like a great idea but they don't always have the best selection or even the lowest prices. Why spend time trying to online shop for my paper towels, toliet paper, sugar, etc... when I still have to go shopping at Aldi and the local supermarket because they don't have everything I need.
I do use Amazon Subscribe and Save as it is really a time and money saver not having to go to the pet store anymore for my dog or cat food or litter.