I've used Ocado 10 years. Back then they were ahead of the game in terms of ease of ordering and sensible substitutions etc. Since then the world has caught up and overtaken them - I think the Sainsburys app is just as good, also offers 1 hour delivery slots and they are just so much cheaper! Ocado are also TERRIBLE when something actually goes wrong with no response from customer service. Last Christmas the centre piece side of salmon wasn't delivered on Christmas eve leaving me absolutely devastated for Xmas dinner and I didn't even get a response when I contacted customer service! I've needed to make a complaint this week too and have had no response all week despite me chasing up. It's just really not good enough. Sainsbury's online for me from now on and i look forward to saving money!