Yep and polls have shown it was successful for 8% of mums in a short period, I think 2-4 weeks? But thats a pretty poor stat, especially given there are around 800 studies saying that leaving your baby to cry for extended periods is not good to varying degrees. They would be better off training MCHN as LC's (they arent as part of normal training), they should be training them in sleep cues to pass onto parents and then offering them ALL their options, starting with the 'no-cry' stuff first.