We use the vegetarian version of the fresh 20. I don't know how often they have sales but they had a half off sale in December and I purchased an annual membership for $27, which is pretty cheap.
You can download a free trial week on the fresh 20 website.
They have a preprinted grocery list for the week which includes prices - prices are usually in the range of $60 for the week in total. Most prices are comparable to grocery stores in the area. However they also have "pantry staples" which will cost some money to accumulate.
I signed up when my baby was 2 months old - honestly I couldn't have done it before then as it does take some work to get the meals on the table each night.
On an average week we LOVE one meal, like 3 meals and one meal is just okay.
What I do love about fresh 20:
-We can use it or not use it. So if it is going to be a crazy week I just don't do it.
-I like having the annual membership so I can search all of the archives and pick the one that sounds most delicious
-It really does help us to eat a lot of fresh veggies. And it helps us move away from too many carbs and dairy products, which is a trap we fall into as vegetarians
-It encourages me to try new things.
-I love just printing off a shopping list and going - so easy!
-Most nights there is enough food for both of us to have a good sized meal and then for my husband to take leftovers for lunch the next day
Hope that helps!