Second Cruise on Nautica and both have been great. The staff is great and do their best to make sure you enjoy the experience. As usual on any Oceania ship the food was well above any other line.
While they do not prohibit children, I do not believe they would enjoy this ship. The ship is small and has no activities for children. Seniors will especially enjoy this ship as it is easy to get around.
The ship is small which has advantages and disadvantages. In most cases you disembark very close to the city centers. Since a little over 600 passengers are on board you will have ample opportunity to meet your fellow travelers. I highly recommend a sharing table early in the cruise.