Well, looking at the reviews so far, there are some readers giving 5 stars, and others giving 2. So it seems that the Zuiderdam experience is pretty variable, but I can only give my first impressions.
1. Air Package. 0 stars.
Flying from the UK, we were only given 1 hour between flights at Boston airport. This is not long enough to go through US immigration, to take baggage through Customs, recheck baggage, change terminals and go through security screening. We were out of breath and very stressed when we made the connecting flight. Arriving at Miami airport we were met by probably the least enthusiastic agent ever, who managed to direct us to the transfer bus to our hotel. Unfortunately, our transfer bus, halfway to the hotel, had to turn around for a passenger the agent had missed. So with heavy traffic, that was another hour of travelling on top of the long flights.