Instruct: Classify Amazon reviews into positive or negative sentiment
Query: By itself, the buffer ain't up to snuff. Get the full kit for a few dollars more.

This Pedicure Foot Care Kit is ideal for people who have slightly calloused soles and heels.The battery-powered exfoliator has three interchangeable discs with different textures. The discs rotate, much like an electric sander. However, because it is powered by only two AA batteries (not included in the kit), too much pressure causes the disc to stop spinning. This may not be a flaw in its design, but actually a safety feature. The unit is very light and fits comfortably in your hand. It is also covered by a one-year warranty.