We eat far more veg and have a more varied fruit diet by getting a box delivered.
Not necessarily because we don't like the things we get but because it sometimes wouldn't occur to me to buy them IYKWIM. Beetroot for example, spinach too.
I get Riverford and have started buying their own milk too (freezing half of it for use later in the week). That way I don't go into the supermarket every other day for milk (we get through a lot!) and end up spending £20 on other things.
A medium veg box and a fruit box is £19. My order is usually £30-£35 for that plus extra bananas, milk for the week, eggs and cream.
The quality is excellent too.