Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Worst Purchase for Dollar Value

You get 7 colored gels for $31, WITHOUT the two filters to sandwich the gels as stated in Amazon's Product Description. A better dollar value is to buy sheets of the Roscoe's gels from a local photography or theater lighting company and cut out your own. This reduces your price/gel to 10% of these and wil have many more!