We decided to formula feed our daughter before she was born. When she was born in the hospital we started her on similac. She was doing great on it and was drinking a lot. The only problem we were encountering was the cost of the similac formula. It was extremely expensive and with a growing baby we knew the expense was just going to keep growing as well. We decided to go out on a limb and try the members mark brand formula. Our daughter loved it. We didn't have a single problem switching her over to this new formula. She actually liked it a lot better than the old stuff. We never had an issue with gas or throwing up at all. She slept through the night at about 3 months and the formula filled her little belly very well. And best of all was it was extremely less expensive than the name brand formulas and it's basically the same exact product as the pricey brands. We would highly recommend this formula to anyone.