Two out of three online delivery orders just didn't turn up - no communication from Sainsbury's just an absence of food. Turned out that failure #1 was because there was a problem with the payment card, Sainsbury's own website says that they will call you in that situation (didn't hear anything). When we called up to find out what was going on they were very apologetic and gave us a £5 voucher. Was then v disappointed when our third delivery didn't turn up (failure #2), we were sitting in our house with phones at the ready in case there was a problem, but just didn't get a delivery. No phonecall, no text. The driver claimed we weren't in, but tbh, between 9 and 10pm on a sunday night everyone is at home. If you do decide to use Sainsbury's online delivery, pick a slot when the shops are still open, as in my experience you'll need that as a back up.