Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Set of Cans!

Great company, great sound, great quality. After getting them I had one problem with them, The hinge unit. It is sensitive, and if you aren't careful you can snap it without even noticing it. But I called up Sennheiser got a RA and sent the headphones back. A week or two later had a brand new pair and haven't had any problems ever since.