has pull out method worked for you? or not?

Just curious to see what women say.  I know it's probably the worst form of bc, if you even want to call it that haha. My friend has used it in between pregnancy and it has worked. They used it 5 years with no unplanned babies but do have two planned children of their own. I've used it 2 years successfully. Has it not worked for anyone? I know there're a lot of factors going into it but just want to hear from others.