When my oldest, now 13, was 6 weeks old the dr. told me to try it. Not because of sleeping, wasn't thinking he would at that point. He was nursing and getting formula, and it just wasn't enough. Since, dr.'s have changed their minds. They feel it's better to hold out 'til the 4-6 month window because of allergies. I nursed the other 2 only, then when they turned 6 months tried them with food. My middle guy loved it, younger one hated it, he went straight to pureed regular food, usually mexican~ loved beans and rice! Go figure. I guess my point is, I'd hold off for now unless dr. says to, and just enjoy as much as you can snuggling them all night long! Before you know it, they'll be 13 and upset if you wake them before noon!