Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Product

My wife and I have all hard wood floors and have tried several methods to clean. These include mop, wet swiffer, and vacuums. We eventually resorted to hands and knees scrubbing with a sponge. This took a long time and was hard work. This floor cleaner is equal with the hands and knees method. We vacuum first with a more powerful dry vacuum then use this to clean, which is why it is only four stars.