Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent Product for Maintaining Convertible Tops

I've used the RaggTopp product for a couple years. Both the cleaner and protectant are easy to apply, efficient and very effective. The protectant leaves the top with a non-sticky, non-reflective finish that lasts for several weeks in the sun and longer in the rain. The product is competitively priced, as well.