I voted breast. I breastfed my first exclusively for just four months, i had a shockingly misinformed health visitor who convinced me to mix feed, and so i gave Kayleigh both until 6 months old, then went on to formula only. With Carly i breastfed exclusively until six months, i read everything and researched and made sure i knew better. I breastfed Carly until she was almost 2 yrs old. Formula is a god send for some babies, but it doesn't have the antibodies that breastmilk does, or even half of the health benefits to mother and child.