Have been using this for my daughter to sleep in at night. She could not lay flat in her bassinet due to reflux, and this rocker allows you to manually adjust the angle. There's not much room for them to move around, but if they do, the sides are mesh, so I felt comfortable about her still being able to breathe okay. The rocker is pretty plain, with the only feature being 2 modes of vibration. However, we bought it mainly for sleeping so it has been perfect, as we didn't need the bells and whistles of a rock n play.