Would we do it again? Yes. It was not as hard as I thought it would be and it turned out to be so beneficial. We are actually planning to do it in the month of February as well. January was not a good month to save money. We needed every dime. But because of some recent turn of events, we need to save every penny, as fast as we can, when we can.
I will say that sometimes it really did suck. And I might have been having actual withdrawals from not being able to buy stuff. I became really irritable the first week because of the urge to at least buy something, even if it was a dollar! I eventually overcame that and really had a peace set upon me by freeing up the thought that I needed to buy something.
If we managed to do a Spending Fast for the entire year, at our current budget, we'd save close to $6000. I'm not very sure it's worth it, in our case. In Anna's case, she managed to pay $24,000 in debt in about 15 months. WOW. So it all depends on your circumstances to see if a spending diet or fast would be best for your family. We like doing Spending Fasts for 30-60 days. It's beneficial for us when we want to save up for something big that we want pretty soon. However, I think we might start focusing on the Spending Diet guidelines in order to save up for a really awesome family vacation :)