My dear friend used this sleeper for her babe. He loved it and she used it for pretty much all of this naps and nighttime sleeping. (He had reflux and needed the incline). He developed a flat spot on the back of his head due to this sleeper (confirmed by dr.) and ended up wearing a helmet for several months. When she used it, Fisher Price stiffens the back of it with a plastic sheet which presses against the babe's soft head. Don't know whether Fisher Price has changed the way they make it, but be aware before you put you baby in this or any other type of similarly made sleeper/bassinet.