I am surprised by the sudden cessation of aggression. I am happy for you though. I would be always watching like a hawk to ensure the situation is always monitored.
As a child, I grew up with dogs that didn't like to be pushed and pulled. You leanrt simply to leave the dog alone. One side of me always thinks that an aggressive dog should be euth'd but the other knows the dogs I grew up with and the lessons we learned regarding respecting a dog's space.
I am fence sitter and believe each scenario deserves individual thought and decisions. One size will never fit all in the dog world.