I didn't breast feed and my daughter was held in the NICU for 6 weeks and they tried every formula and the Gerber Good Start worked best. Honestly every baby is different, it's trial and error and give it a solid month to test out formulas unless there's a major complication right off the bat because remember there digestive system is young and intolerable to things at certain points. I eventually switched the Enfamil than Enfagroe cause my daughter seemed constipated and very gassy on the Gerber. It's also a little pricier. Great containers though, reuse them for anything ie a medicine case.