I bought this as a back-up to the the Big Green Machine. Both my wife and I love it, so simple to use. We both live fast pace lives and know we can count on the SpotBot to clean up any pet accidents. If needed, we just reset the unit and start it up again on the stain. EZE-PEZE. Clean up is a snap also, just empty the tank and rinse. The formula leaves the room smelling wonderful after use. Best money I've spent in some time.