I had a really awful induction experience with ds, ending in emergency c/s and I will do anything I can to avoid that again. Especially with the way doctors push induction on women. And also having had a previous c/s it can actually increase the risk of my scar rupturing if I get chemically induced.
As some others have said, herbs etc. won't induce labour if your body is not ready. They just help to prepare you. Personally I don't see any difference between taking evening primrose oil, or having sex with my dh and going for a walk to bring on labour. They are all trying to stimulate and prepare the cervix.