We never expected to formula feed, but ended up going this route after we learned that breast feeding wasn't an option.  As everyone knows, formula is very expensive.  The nurses at the hospital that I delivered at told us that it was not neccesary to buy the "name brands" since they are all for the most part the same, and have to pass the same safety guidelines to be able to be sold.  We absolutely LOVE Sam's Members Mark formula.  We tried Enfamil, Target brand, and ended up choosing to use Members Mark.  It is definately the most for our money, and our son loves it.  We never had a problem...