Was trying to decide which formula to use with my son and I decided to go with Simalac. So far so good. One major plus for me was that its one of the few formula brands that has Luiten in it (which is good for the eyes), so after my pediatrician told me that, I was pretty much sold. Everyone in my intimate family wears glasses so eye health/strength is a great concern for me. Plus it offers all sorts of packaging offers, from powder canisters, pre-mixed bottles, and travel powder packages - which is convenient.