I've been trying to get a big coffee stain out of my white rug for weeks. Spray. Scrub. Repeat. I planned to rent a commercial machine for the job (even though they gross me out because I'm not sure where else they've been used, and because they are SO heavy and awkward to wheel around), but then was lucky enough to receive this carpet cleaner from the Stellar Product Testing Panel. It took one cleaning to completely erase the coffee stain. Amazing! Did I mention it was lightweight and easy to maneuver?! I then used it to clean all my area rugs and the stairs and it performed beautifully. I'm obsessed!