I bought this headphones before 2 years. Even now, its performance is same as how it used to be. There is no defect. Design is amazing. It is very comfortable to wear(doesn’t cause pain for ears like many other headphones/headsets). But the sound is not impressive. In the same price range, Sennheiser and other companies can give headsets with better noise cancellation and better sound quality. I would say Sennheiser has an upper hand in this range.