Lifesaver!!! By far the best thing we purchased for our newborn. Lots of people say it's unsafe to let your baby sleep in these, but it's honestly the only thing he would sleep in for the first two months. We have two, one that vibrates and one that doesn't. They are the best because they fit next to the bed and don't take up a lot of room and they are easy to see in while sleeping plus they transport super easy versus a pack and play with a bassinet or any other newborn sleepers. Our bed is up high, so it's easy for me to just put my arm out and rock him or give him his pacifier as well as I can just glance over and make sure he is okay if he makes a sound. They may not work for everyone, but they worked for me and for a lot of people I know.