This is way too big for its purpose and thus ends up adding too much bulk.The build quality is not great. The battery door makes a poor contact and thus sometimes the controller doesn't work. Also it opens up easily and drops the battery.Finally, the switch is very hard to move, which makes it inconvenient because sometimes is hard to activate single handedly.Aside for that, the audio is good and it does let you peek in to exterior sounds without having to remove your headphones.