Instruct: Classify a given Amazon review as either positive or negative.
Query: Koss

over rated and over priced, I purchased a set for my metal detector and discovered how poorly they performed, If I could have listened to them before I purchased them I would not have bought a pair, also they are very heavy and uncomfotable to wear, my $10 pair of headphones sound and wear alot better than these koss units but they do not have a volume control, koss used to make some pretty good stuff but this unit needs to be redesigned..