I've just taken advantage of a voucher offer for Ocado/Waitrose, for £20.00 off your first online shop, plus free delivery. Minimum spend is £80.00. Offer ends January.
I've stocked up on the cat food I get as they have got a great deal on right now - two boxes for £5.00. Some items are more expensive than other supermarkets, as you would expect, but their brand stuff is no more expensive than Sainsbury and Tesco but the quality is much better, I've found. They also have some pretty good offers on at the moment.
I got £82.00 worth of groceries/household items for £62.00, delivered free.
Here's a link to the voucher, which I believe is valid until January 2015.
http://www.ocado.com/webshop/getStaticC ... teId=21947