They have removed the last piece of the hassle of shopping. Now you don't need to even get your computer out and search your past orders.

In all honesty, I don't think I would use the buttons though. The API is the important piece. I could see me configuring this with IFTTT do button or something. Do things like order a week of groceries when I know I'm going to be home for a week, etc.

I'm sure people are going to hate on these buttons, think of the API here.