Instruct: Classify a given review into positive or negative sentiment.
Query: kind of works, but not well enough to purchase

The treads on most shoes/boots go from left-to-right across the sole. This product only allows one to swipe the shoe front-to-back, with no side-to-side option. Therefore, the product only gets some of the dirt, etc, off your shoe (maybe half). You still have to find something else to scrape your shoe sideways across. To conclude, this device does not work very well, and I would pick something else if I could do it over again.