I did 3 weeks of researching trying to find the best organic formula. Read so many negative reviews on the big name brand formulas and started seeing a trend of moms saying they switched to parents choice and loved it. I was held back by "store brand" stigma and thought if it wasn't expensive then it wasn't the best. After another week of looking into how parents choice was made and the ingredients I decided to go for it. I did a gradual switch with 1oz formula and 4oz bm for 4 days and then added more. Never had spit up, constipation, or gas. Only bad thing I have to say about this is that I cannot get it at any stores around me and I don't like the option of "ship to store" not being available. If I choose free shipping it takes 2 weeks to get to me so I really have to plan out how much I need.