The only difference from real Birkenstocks is that the bed for your foot is a bit flatter and doesnt have as much arch support. I still like it. The sound is really excellent, great stereo separation for music, but the button layout is superb, with one to control tracks and actions, with a separate smaller button for volume control. At maximum volume and light on, the battery life is 4 hours. This one is not included. Bei so einem geringen Stromverbrauch könnte man sich all die Schalter sparen, mit denen Steckdosen lästigerweise erst eingeschaltet werden wollen. They run wide but will be fine for a person with a wide foot. Update 2/13/19: I got the replacement headphones a few days ago, in about half the time they estimated! , but none of those options seem to have any effect. If you dont want anymore wires taking over your desk area, this is definitely the way to go.