Product review (4 stars): Great little washer
I bought this to take on vacation with me, but used it at home first to see how it performed.  It gets clothes REALLY clean.  I had a pair of my daughters muddy socks, and washed one in my regular washing machine and one in the Wonder Washer. The one I washed in the Wonder Washer came out cleaner in a shorter amount of time.  I put Wonder Washer in the (empty) bathtub b/c there can be some minor splashing when the machine is on.  You also have to make sure the Wonder Washer tub is dry in the bottom or the whole tub will spin around instead of just the agitator and clothes.
Pros: Gets clothes clean, portable, holds a lot more than a sink and is easy to use.
Cons: Heavy when full of water, you still have to rinse the soap out of the clothes, tub lid flimsy, and you have to manually drain.
I would buy it again.