Instruct: Classify the given review as either positive or negative.
Query: Perfect sound

These headphones work really well, they block out sound so well that i was actually quite surprised by it.The price for them is very reasonable for the results you get.On time delivery was nice because my Apple Headphone broke and i was just in need of some good headphones so i can jam. ASAP.And i got them!Definitely worth the buy!