I typically avoid Walmart, though we do venture in there when she wants something only they seem to carry. Mostly I shop at Meijer, Costco or Sam's Club. Costco doesn't seem to have it yet, but I almost always use shop & scan now. Meijer has 3 kiosks just for checking out with shop & scan. At Sam's Club I just swipe checkout on my phone and they scan it on the way out.