Product review (5 stars): I'm impressed!
This thing works!  I am very happy with all five loads of laundry I did today.  I did not use any detergent.  Another thing I noticed is my washer doesn't stink.  It used to be that I could not leave the lid closed when the washer was not in use but I closed it today when I was finished and I just checked and there is no smell whatsoever in the empty washer.

I have one question, though, for others who use this product.  Mine flashes red for a nano-second when it first comes on, then immediately goes to blue.  I cannot find anything in the pamphlet that came with the item that mentions this so I cannot tell whether this is normal or not.  Since it goes to solid blue immediately after the red flash and I see bubbles in the water through the viewing window, I am assuming the red flash is normal but, if this is a signal of a potential problem I would like to know that sooner rather than later.

I was skeptical, and now I am not, though I do wonder how long the unit will last.  The pamphlet says it should last "a long time" but that does not tell me much.  With it costing almost as much as a washing machine, I expect it to last as long as a washing machine; I hope I am not disappointed.  But with that said, I am for now very happy with this product.