The perfect treble and bass balance, a depth that Bose is known for, that was missing from the Soundtrue 2 headphones which almost offered too much bass. Need hear it myself, which is a difficult taskConnectivity - has been above average, switching between devices is a concern on some occasions. I mean no Active noise cancelation. Just like other reviewers posted. I do most of my errands for groceries or goods on a bicycle since I moved to Petaluma and soon realized having kick-stand to support the bike while loading/unloading the panniers is a God-send. no stretch at all. ? It looks like someone has already worn it a little bit. Small, loud, Bluetooth is a cinch, easy to set up on PC. No instructions in the box but, all the needed install hardware was included and super simple to install! even if you took the whole bottle very unlikely of getting any effects.