Well Shana, that didn't take long! You made a great choice. Aft cabins are my favorites since the view from the balcony is better than those along the side of the ship.
As Rick said, since you have cabins above and below you, and you are in a corner, it will be a very quiet area. I've not been in a Vista Suite but a well-traveled friend of mine has, and he enjoyed it immensely.