As a resident of San Francisco, I have access to pretty much every on-demand-delivery service on the market.

And I don't use any of them.

But with the recent news that Google's shopping service has started offering fresh fruit and veggies, I decided to try out the three main grocery delivery options — Google's Express, Amazon's Prime Fresh, and Instacart — to see the pros and cons of each and whether they could convince me to cut a weekly shopping trip out of my schedule.

Here's what I learned, and what you need to know about each one: