A Dr suggested this to me for Charlotte's growing pains because she was waking so often and I was a walking Zombie but I wanted to see if she settled again. She hasn't reset fully to a full nights sleep but it's close.

One of the mums at playgroup had tried everything before finally resorting to this to get her then 4 year old in routine. Apparently the reason she finally resorted is because she had a car accident being she was so tired. I can see in instances like that where it's beneficial meaning last resort.