The only issue I have ever had with these headphones is occasional disruptions- like track jumps. These only occur when the phone, or other device is situated to the left side of my body (e.g my phone is in my left pants pocket) due to the right earbuds being the primary earbud. These are rare and easily fixable with some adjustment (or merely moving it to a pocket on the right hand side). Amazingly noise cancelling. I will never hear my mother yelling for me from downstairs ever again.