I use tesco.com for grocery shopping for the majority of my shopping.

Ease of Use
The online supermarket is very easy to use. There are three main methods I use to access what I want. Firstly favourites which will show up the things you have bought previously so allowing an easy click to buy your regulars. Next I always go to offers by department and then build my weekly menu around the fruit and veg and meat on offer. Finally I use the multi search to get the last few things. Overall I think my shopping takes less than half an hour, which includes menu planning and can be done at any time of day.

It's also great for self-catering holidays as you can order your food to be delivered to your accommodation. For school holiday times this often needs to be booked well in advance. The good thing is that you can amend your order up until the night before so a short order at the time of booking is all you need.

Timing of Deliveries
Delivery slots are every two hours and are available every day. For my local store you can usually get one for the next day except at holiday times. Your final delivery time is then reduced to an hour by text message the morning of delivery. My experience is that they are very reliable with the delivery slots and will let you know of any changes or delays.

Quality of Deliveries
On the whole the food delivered is of the same quality and use by date that I would pick myself. Where food is short dated this is usually highlighted and option of return is available. I always request green bananas and have always received this. I have experienced very few alternative items but those I did I was happy with.

Dealing with Issues
I have always found the staff very helpful with dealing with any issues I may have. Any items I wished to return have been returned no questions asked with refund coming through quickly. If something is damaged but still partly useable, the local policy is to refund but let me keep it .

Overall
I would strongly recommend using Tesco.com for your grocery shopping. The benefits it time and money saving outweight the cost of the delivery and where the shopping is not to a quality you would pick, you can return it.