Wow you got tons of advice on this one!!!! There's the pros and cons of CIO method.. some great, some not so great.. but.. truth be told, the earlier you sleep train the baby, the better off you two will be. I sleep trained my son at four weeks old.. I have two older children, and as a deaf mommy, I need everyone on the same page. I used the Cry it out method.. for TWO nights.. and since then, he's been a 12 hour a night sleeper, with two naps a day. And he's still the same great, well behaved baby. He's NOT traumatized.... he learned to self soothe, and is the best baby on earth, I swear.... With my oldest child, I couldn't bear the CIO method, and it took me 9 months and finally in the end, making her cry it out, again for TWO DAYS.. until she too, slept thru the night. So, I'm not for or against anything, except what's best for baby. It's a gift to yourself and baby, to have a well rested child and well rested mommy. Whatever your decision is, we all support you! IN the end, it's your baby that you know the best... Best of luck!!!
S.