Product review (5 stars): Great for RVers!
We have had one of these marketed under the name of Wonder Clean and used it for the last 8 years and the lid finally gave out!  This one has the following improvements:  1) An improved lid with metal screw;  2) A wider, sturdier and easily disassembled base (important for RVer's);  3)  The Crank Handle has a metal shaft instead of plastic and has a clip to hold it on;  4) A built in drain!

We anticipate this design lasting longer than the original one.  We had to repair a leak on the original tank (easily done with the many types of repair type goops available at Lowes and Home Depot) and we reinforced the base with plywood.  When the plastic screw on the lid finally stripped out we had to give up and buy a new one, over 8 years later!  Not bad, for the price!

The instructions on this one lack assembly instructions (but if you really need those, you should probably rethink life anyway!)  This is easy to put together if you can figure out how to open a door or put your clothes on!

However, the instructions are much improved on how much soap to water to use, etc!

IN short: Works fine lasts a long time!  (with reasonable precautions!  Cripes! People it is made out of plastic!  Engage brain, put to use, put away, THEN disengage brain (if you REALLY need to)!)  :)

UPDATE:
After several months it is still working great!  Saved us many miles of travel to town to do laundry and gave us more time to drink wine!