Ocado provide an absolutely excellent service, from the ease of use of the online purchase system to the grocery delivery. They provide comprehensive stock information so the customer is only very rarely disappointed upon delivery by substitutions or missing items. Lists are date organised and usefully detailed and always accurate. It is not necessary to inspect the costs and special offers on the invoice to see whether discounts are applied, unlike with other retailers I have used. Breakages, leaks and substandard items sometimes happen but Ocado deal with these quickly and accurately and this can be done on line without the need for long telephone discussions. I would highly recommend Ocado from whom I do my 'Waitrose' shopping.