I am writing this review on Thanksgiving night after experiencing a remarkable situation. I bought wall-to-wall Karastan carpeting a month ago and also ordered the small Shark StainStriker as a precaution. Today, an hour before guests were due to arrive, my cat Jazzy had an accident and made a mess on the carpet in the dining room. In a frantic rush, I opened the StainStriker and swiftly read the directions. Assembling it was straightforward, and to my amazement, it swiftly eliminated the large brown stain from my white rug. I am absolutely impressed with this little machine!