I supplemented this formula while i breastfed my little one and she did very well with it. No problems spitting up or with her stools.....i came to a point where she just wasnt getting enough from me so i switched to all formula again no issues .......she has done great on it and is very happy and gaining weight just like she should! I also signed up for coupons and i get them regularly in the mail so it helps with the cost! Im very happy with it!!