I really noticed that she is filling out and gaining weight last night while I was feeding her. She fit differently in my arms before and she was light as a feather. There is more to her now and that makes me happy that she is thriving on what she is getting from me. Due to my horrible experience with breast-feeding the first time I was pretty concerned about how well she is doing, but I think it is safe to say things are awesome. She is still so tiny as she is still wearing her NB clothes and as you can tell from the pictures the size 1 diapers are huge on her. They are literally half the price as the newborn ones.