Ocado is reliable and the produce is good value, good quality and with a reasonable shelf life. Items are rarely substituted or out of stock. I also like the fact you receive a text before delivery to say if there are any substitutions as it gives you time to decide if you want to keep them or not. Substitutions are usually appropriate ones and not e.g. Smoked salmon for salmon fillet as I have received from another supermarket. Customer service has always been helpful arranging refunds for damaged items. The only complaint I have is that bread and bakery items are sometimes packed with heavy items like bananas or tins and end up squashed. Despite repeated emails this still happens from time to time. On the whole I think Ocado is the best delivery service available.