It's a concierge room, so right away, it is a premium. Cost depends on the sailing. I looked at this room several times, too, because I like the idea of the separate bedrooms, but in the end, it was cheaper (much cheaper) for me to get 2 4A rooms than any concierge rooms.
Don't discount 2 4As that are attached/connected. Unless you had your heart set on concierge, this will be cheaper. Are you 2 adults, 5 kids or more adults? Remember each room has to have an adult booked in it, but
DCL doesn't care who ends up in what room/bed for sleeping. They just want an adult responsible for the room.