Castor oil

Any experience with castor oil? I have heard people taking crazy doses like 2-4 ounces. I get induced in 3 days but was thinking maybe trying a couple tablespoons of castor oil. I've read many good things and a few bad. I also read 57% of women who took it were in labor within 24 hrs, while 4% of women who didn't take it were in labor within 24hrs. 
Stories? The good, the bad and the ugly... All appreciated