I posted on this topic a while back. I was not really a fan of CC myself but did it with DD when she was about 11 months (#2 was due soon after and we were having probs). Now I know a lot of people here are anti CC, but I did get a lot of prof help from Tresillian etc and it worked wonders for us. But having said that DD never got so hysterical that she vomited - I wouldn't have continued if that had happened, but it was probably the hardest 4 days of my life and then click, it all happened well and she now goes to sleep by herself very quickly. But there are times when it comes unstuck when they are sick or teething, but it was an absloute lifesave for me and I got my life back and to be honest, DD is a much happier baby for it.

I totally support people who hate the concept but please don't critisice me for doing it! What works for some people won't for others and vice versa. Just do what you want to do and respect others choices. I think that the child should definately be a bit older though, I wouldn't even be tempted to try it on a 6 month old.