Product review (2 stars): I won't purchase this again after using it three times.
This product didn't work for me very well.  Yes, it did remove some of the scale, but after several uses and cleanings per the instructions we were still getting scale and stuff from our washer.  I eventually disassemble my washer and removed the inner tub and pressure washed both the outer and inner tubs to ensure it was clean.  Bottom line, the amount of time running this thru a cycle and then doing several other cycles trying a soak, it was much quicker to disassemble and manually clean it.