If I have $25.00 to $50.00 a month left over for my quilting I buy something I need for the project I'm working on. Also with the Quilty boxes is they sometimes include a ruler or something like that & you already have it. It would be a waste of money to have 2 of the same rulers that you only occasionally use. On the other hand if I didn't have to worry about the cost then I would probably do it. I like surprises & it gives you something to look forward to every month. It just boils down to what you can afford.