I have attempted CC with all three of my kids. Worked fabulously with DD and DS2. DD was such an unhappy, crying baby that she would cry regardless of whether I put her down or held her (she got in bad habits due to bad reflux in the first six months), in the end I had to put her down and let her cry herself to sleep for my own sanity.

But with DS1, it actually made things worse. He is still a bad sleeper at 2.5yrs, and we get up numerous times throughout the night with him, whilst the baby now sleep through. I was very hesitant trying cc with DS2 after the experience with DS1, but after some terrific advice from another BB member I gave it a shot, and the past couple of weeks have been great (I am actually getting some sleep and bubs no longer needs me to hold him while he sleeps).

My point is simply 'what works for some, may not work for all'.