I started labour prep acupuncture just before 37 weeks, had 2 sessions of that a week apart. Started labour induction points just before 39 weeks, another at 39 +3 and a third at 40 weeks. Went into labour at 40 +1.
After each induction session I felt contractions and it certainly moved bub down. I also give credit for my fairly fast 'first' labour to the preparation acupuncture.

As far as bub not liking it goes... I don't think babies like anything that disturbs their comfy living space. You are hoping for contractions and labour so don't expect bub to be happy about it.