Elaine, it was easy and made two gallons worth. I like the fact it doesn't suds a whole lot, sudding comes from an additive which is not earth friendly and it's not necessary to the washing power.
We haven't done laundry yet, but we did put a half cup in the water we used to wash the car, has a good grease cutter. :) The ingredients cost about nine dollars, but we only used a half cup of each powder, so there's lots more to make if we like the way it works. And two gallons used a half a cup at a time should last a long time. I'll let you know how the laundry turns out.