Ds1 was on formula from about 4 days old. We used s26 then karicare and finally settled on Heinz till he got to 12 months and developed lactose intolerance and was put on lactose free formula till he turned 2.

Ds2 is primarily breastfed but has a bottle of formula everyday and I'm giving him Heinz again.

Both of my boys have never had too much of an issue with any formula so I think it just depends on the child and what they will tolerate.