My kids do their own laundry too and it makes it way easier. My ds is four and loves it now because he doesn't have to ask anybody for any help putting the soap in. Since they are on the expensive side we will continue to use regular soap for us and just use those for the kids.
I havent yet. Ive been thinking bout it. I found a coupon on purex.com. Ihavent printed it yet so Im not sure for how much. But here it is http://www.purex.com/purex-3-in-1/product on the right upper side it says 'get coupon'. Anything helps right? :)