this is possibly the best thing we purchased for our baby, if only we had it from the start, we brought it when he was aorund 8 weeks old, I could only get him to sleep at night by either nursing him or rocking him to sleep. From the first night of using this he went off to sleep soothed by the heartbeat. He loves the projection and the animals dangling from the canopy, he smiles and laughs at them. We let him have 5 mins with them then switch to just the music and he goes off a treat. Well worth Every penny!