This device is great for the stroller or the car but is also a wonderful sleep product because it can be used when baby is in the crib as well. (sfnewborncare.com)
Obviously this would be difficult if baby is in a crib in a separate room. (greenbabyguide.com)
The safest place to sleep is in a crib with a firm mattress with a fitted sheet. (twinmom.com)