This was our first cruise and we picked the Celebrity Constellation since it gave us exposure to seven cities/countries in northern Europe (Oslo, Copenhagen, East Germany, Tallinn Estonia, St. Petersburg, Helsinki and Stockholm, none of which we had visited. There were five of us on the trip.
Cabin: Small but very efficient. Our room (outside balcony) also had a bed that folded out of the ceiling that quite comfortably slept our 6' 4" son. There is apparently a third foldout bed in the love seat which was in the room however having all 3 beds unfolded would probably be very tight for this small a cabin. The cabin was always kept very clean and was in top shape. The bathroom was small but well put together. I did find out there are staterooms that are fully wheel chair accessible. The public washrooms also are fully wheel chair accessible. There is a strong box in the closet.
Age of Passengers: The average was definitely between 65 and 70 and almost all of them appear to be retired. As a result there did not appear to be much activity in the Bar at the Edge of the Earth which is the young people's meeting spot, nor did the little kid's area get much of a workout.
Small but well set up. Lots of room under the bed for luggage storage and the closets are a good size. As usual there is never enough hangers though. The beds were comfortable and there is a great foldout bed that comes out of the ceiling that fit our 6' 4" son.