We have used both similac advance and Parent's Choice with Iron (Gentle).  With our 1st two it was Similac and Isomil.  Finally, it occured to us that it was a waste of money to shell out 8-10 bucks a container more for a brand name.  Our 3rd and 5th children became constipated quickly and never did get over it, they needed additional water or Karo syrup to keep things "flowing".  Our 4th child has no issue switching formula's.  — I was pretty excited about the savings since the quality seemed to be the same.  Once I put the labels side by side, I realized… read full review »