I wish that I had gotten this product when my son was a newborn. But I'm glad to have found it now, at 6 months and plan to use it for as long as possible. The OTSBH can be used for a child up to 40 pounds. My son who weighs in the low 20's was breaking my back just carrying him. However, with the OTSBH I could carry him all day and not notice the toll on my back and shoulders.