Our kids stayed in 7565 on the Wonder over Christmas 2000. It was fine. We stayed across the hall in 7566 in a outside room. The only thing they "fussed" about was that we had the balcony. They did not seem to have a problem with the single bathroom even though it was a brother and sister teenage combination.
Nice location amidship close to just about everything.
One thing I did think about is that this is a inside standard stateroom and the arrangment is that the bed is directly in front of you at the back of the room with a couch/bed on one side nearer the door. Since there was not a porthole it was quite a cozy feeling room. More than 2 people would be a pinch.
