We call this bumper a snake and we use it every time we travel. Sometimes there is no separate bed for Mia and we need to sleep altogether. When she was still really small (2 months old or more) we were scared to spend a night with her in a bed. She was so tiny and fragile that we were worried that we could harm her.
Snake turned out to be a perfect solution for us. It separates her from us and still we can hold her hand every time she cried. Snake is easy to carry, light and nice in touch.
Even though Mia is a toddler now, we still use it.