I have had these headphones now for 3 months and I am still surprised with how great they sound. Every time I am traveling, or going on a long drive, these are my #1 accessory. The price is not too high, and they are built well. I have tried numerous different noise cancelling headphones and most of them have a "hissing" sound that drives me nuts. These are very subtle, and non intrusive to the music. I am really able to relax and forget about whatever is going on around me. Great Purchase! Best in Class!