Instruct: Classify the given Amazon review as either positive or negative.
Query: Treading carefully.

After buying a very used treadmill we were advised to obtain a silicone lubricant for the belt/platform. The old machine was not as 'slick' as it should have been, making groaning sounds as it progressed. Using Amazon as a search and select instrument we settled on LifeSpan silicone treatment. With two consecutive days' treatment, at nominal cost, we had a silent, efficient treadmill worth walking with. If I had to recommend any changes in the LifeSpan it would be an angling sprayer to allow convenient lubrication. But the prompness of Amazon and effectiveness of LifeSpan put us back on the road again!