DS (18 months) has never been a great sleeper. We’ve had at best maybe 2/3 nights a week of ‘sleeping through’ to about 5am out of a 7 day week, but also many weeks where every night is unsettled.
We have 2 issues - getting him to settle down to sleep at the beginning of the night can take about 45 mins (or longer). Then he often wakes up at about 1am and might stay awake for an hour or two 
We have done some sleep training, with a really lovely consultant who got us into a much more sustainable routine (no more feeding to sleep etc) but even she admits DS is a tough nut to crack and we’ve had to repeat the training a number of times already.
The one thing we haven’t done is controlled crying. I definitely am not trying to start a debate on the rights/ wrongs of it but it is something I’ve wanted to avoid where possible.
We are considering it and have some friends whom it worked very well for. However their kids have always been more chilled than DS. I’m loathe to do it if it doesn’t work and certainly don’t want to have to repeat it everytime he’s sick or teething.
I have a lot of positive stories about controlled crying so now looking for stories where it didn’t work so I feel like I have all the facts.
So AIBU to ask if controlled crying DIDN’T work for you to share your story?
Thanks so much!