I received the charger immediately after ordering. I haven't installed it yet. But I know it is the correct one.
I have had my laptop for three years and this will be the first replacement charger. From what I have been told the charger needs to be changed every two years. I only get about an hour on my original charger, so I just wanted to be prepared for when it goes. Usually issues happen when I don't have the money for what I need to do, so I figured I would get a jump on it.