1. You don't have to keep the box; the instructions are on a tag on the item itself.
2. Very comfortable and adjustable around your head. If your head slips while you are sleeping, you won't hurt yourself like you do without the sleep pillow.
3. You have to use the straps to attach it to your car/plane seat.
4. It comes with a bag, and it will actually fit back into the bag after you've used it.If you do a lot of traveling or have a really long trip in your future, this is well worth the money. It will pay for itself in a few trips.