We are a family of four including a 12 and 13 year old who shared a basic interior cabin. Embarkation was quick and, unlike with P&O, did not involve a lot of hanging around in a waiting area before boarding. Our cabin was well-appointed, pleasantly decorated, clean and with enough space for all our clothes/cases.
We attended a welcome meeting for parents and children who wished to use the Kids Club facilities but it was somewhat disappointing that the staff member did not seem to know what he was supposed to be talking to us about, and had to be reminded by another member. It was all a bit wishywashy and badly organized. I did not like the room we met in either - it was dark and reminded me of a nightclub. Nevertheless, the children stayed at the club and we went to explore the rest of the ship. We saw that there was an enormous amusement arcade within the Kids Club area with plenty of scope to extract extra funds from children and teens (but maybe that is me being cynical).
First impressions of the Navigator public spaces are good. They are spacious, clean and well-maintained. During the whole trip I saw staff members constantly cleaning and maintaining public areas. In the Windjammer on deck 11 staff were always quick to clear tables for guests, and often when I was eating a snack I was asked by a waiter if I'd like a cup or tea or other drink prepared and brought to me. This was much appreciated, especially if it was a busy time.