We cruised in a 4B, under the Mickey Pool, on the Magic in 2011. Kids were 4, 7, 8 at the time.
We loved it!! Are you going to be able to do cartwheels around? no. LOL But for what we used the room for it was great. We are sailing again this year in a 4A on the Fantasy, the kids are 6, 9, 10 and I have no worries!
LOVED LOVED having a verandah! If the kids were sleeping we did have to climb over the murphy bed a bit to get outside, but it wasn't that bad. The kids were/are young enough that we didn't have bathroom concerns as far as hair, makeup, etc.
Sleeping arrangements were perfect, the curtain divider helped with changing privacy. And really we slept, showered, and had some afternoon snacks in there... or were sitting on the verandah. A couple of afternoons the kids took a nap, we put all 3 in our bed, pulled the curtain and DH and I enjoyed a snack and relaxed in the other part of the room.
Next time we probably will go 2 cabins, I have 3 girls, so it just goes back to the bathroom, showers, hair, makeup thing as they get older. LOL But only if we can afford 2 verandah rooms, I was out there too much to not have one now.
Oh, as far as noise, there was a little of the chairs being moved around stuff, but it didn't bother us. We had the heater for the Mickey Pool across the hall from us and it made a little noise in the morning, but again, nothing major to put a damper on anything.
ENJOY!!!