Instruct: Classify Amazon reviews into positive or negative sentiment
Query: finally, something that works!

After buying and returning two different items, I finally found one that works! This actually stays on my rear window, while the other ones would simply fall off. It serves its purpose well, to shade the sun. The only reason I didn't give it 5 stars is because it doesn't look that great and does obscure my view a bit, but not enough to make driving unsafe.