My induction was at 39 weeks due to my son growing a bit quick and them being worried he'd be too big to deliver. I was warned it could take a long time, be very painful, involve false starts etc, so I was prepared for a long wait and for it to be horrendous.
I had a very good experience, it was very fast, very intense but very positive.
I had the pessary at 11.56am, began contracting within 20mins, was 4cm and taken to delivery for G&A at 7pm, waters went about 9, fully dilated at 11, started pushing at 11.50 and DS was born at 12.02. So twelve hours from start to finish and a 12 minute second stage!
I did have morphine which I hadn't originally wanted as it was so intense, and he came very quickly so I tore, but no worse than a friend of mine who had an intervention free labour a few weeks later.
Good luck, I hope whether it comes to induction or not you have a positive experience.