Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Headphones, but know what you are buying

I bought these headphones as a gift for a friend and they did not respond as expected out of the box, but after a reasonable Burn-in period they perform just as expected. Good sound, comfortable for long listening sessions, great noise isolation. One thing that was a problem that i did not realize would be was the re-coiling cord. It acts like a spring on ones head more than i thought that it would, but for professional applications I can understand why this would be a feature and not a hindrance.