My niece was upset due to just being fed and her stomach having the usual baby issues, a bit of jiggling on my lap with my little finger to suck on calmed her right down as mum was having a bit of a meltdown due to lack of sleep, and baby being super demanding. Niece was asleep in no time due to being handled confidently and noticing what was working and what wasn't.

One size most certainly doesn't fit all.