We chose this itinerary based on the ports. (Copenhagen, Berlin, Tallinn, St. Petersburg, Helsinki, Stockholm, Copenhagen).
Family of 7 - Three generations - Grand-parent, parents and 4 adult children.
The Getaway is a great ship - lots to do for all ages and abilities. If you find yourself bored, it's your own fault.
Cabins - Balcony aft - 11898/11896/11894
11898/11896 connect - that was a plus for our family. The negative: the balconies are super narrow - you can stand and look out over the railing - which is a plus, but sitting down (although there are two chairs and a mini table) is difficult at best.
11894 - bigger balcony due to the location. If you don't need a connecting cabin - it would be my first choice of the three.
The balconies do connect, but NCL does not permit you to open the dividers. Who knew.