My wife and I have been on eight cruises, three of which have been on the Queen Mary 2. We are in our early 40's with two boys ages 9 and 3. We usually go on two cruises per year. One with the kids and one without the kids. The QM2 is the one without the kids. We love this ship and here are some details of our most recent sailing.
Embarkation - Was a complete disaster. Ft. Lauderdale is too crowded and the lines on the pier were long and the organization was awful. Our first two cruises on the QM2 were out of New York and were much better organized. Broward County Ports was in charge of the embarkation process and they totally fouled it up. When I was waiting in the line in the hot South Florida sun, the Cunard representative was yelling at the Port Security guard for sending everyone to the wrong door. So people who were in line the longest wound up at the end of the line. What a disaster!! The ship left three hours late due to the many embarkation issues.
Room - We opted for an obstructed balcony (B5 category) as it was much cheaper and a little more roomy than the high priced balconies. The room is typical Cunard. Organized and neat. We received our complimentary bottle of champaign and chocolate covered strawberries from the Cunard World Club staff. The room attendant was friendly and our room was always clean. The Cunard pillow chocolates are the best I have had.