did you use CIO method or sleep training

so when i say problems i mean like they absolutely wont sleep unless you soothe them or cuddle them. Im truely curious on how often if works. so only vote yes if you attempted the method properly. also only vote if your kid is 18 months or older. again this is for curiosity not advice or jugdement. Also I use theese methods and have never had issues amd my kids are 6,5m4, and 6 months. my kids dont feel abondoned or forgotten and i get a full nights sleep ( unless someone is sick, then its snuggle time!!)