I was induced for both of my kids....my first one lasted about twelve hours from the time that they started the drip to the time of delivery. So that wasn't too bad. For my daughter it was more like 16 hrs but he started me first on the gel, so it took a little longer to get the contractions going. So I wasn't in pain the entire 16hrs. So all in all I had good experiences with it.
It doesn't hurt to ask your doc......all he can say is "no". If he is ok with it than just make sure that you do your research. There is a risk of complications.......and some women who have experienced being induced and having it start naturally have said that it was way more intense being induced. You have to do what is right for you......and what you are most comfortable.
So good luck.......and hopefully it will happen on its own right when you need it to!!

Who am I kidding.......babies don't co-operate....they like to torture us and make us wait......lol