Instruct: Classify the given Amazon review as either positive or negative.
Query: Sludge Hounds Knocking

Biscuits & Slavery CD. Led heavy from this US band that rocks like a battleship in a thunderstorm. Some classic southern elements, with a stoner attitude and slide guitars all over the place. Rednecks ? Hell yeah ! ROSE TATTOO meets LYNYRD SKYNYRD meets BLACK SABBATH.