Picked one of these up in SF at MOMA. Gotta say it's kinda useless, well not useless, just not really useful. It's slow to use both to wind and unwind, not the easiest to clip the ear buds into place as they often come off when winding the first wrap. I often end up throwing my headphones in my glove box or bag instead of using this. Gotta say other products on the market are far better to use. Though, I still haven't found one that leaves my headphone cables straight and not all twisted up.