I sometimes shop online with Sainsburys groceries and have them delivered my primary reason is to get products I can't get anywhere else. Although more and more often those specific items are unavailable lately.Sainsburys is not cheap and so I also shop when they give me a money off Voucher and or free delivery so it helps with the cost as I can't afford to shop with them all the time. Also as with most supermarket shopping online you are at the mercy of those that pick your shopping in regards to quality of products chosen and use by/ best before dates, often items I get have short dates. Also don't get me started on substitutes! As again with most supermarkets substitutes they offer can be a pick and mix of not quite right to ridiculous!