Quick background. We are late 30's. We have been on 4 cruises (this was our second with NCL). We tend to save for a couple years and then splurge on our vacations. We stayed in the Haven in the OS.
We really enjoyed the Breakaway and especially the Haven. The services and perks make it a truly pampered trip. We have been on the Jewel and stayed in the Jewel Haven. If you gave the Jewel Haven major doses of HGH then you have the Breakaway Haven. We didn't find the crowds to be a problem. The Haven rooms were sold out on our trip and it never felt crowded. There were kids in the Haven and they were well behaved but still kids. It did not prevent us from hopping into the Hot Tub with a drink (they made room or left shortly after we arrived). The Haven restaurant was very good and very convenient. We ate all are breakfasts there and a few dinners.
We loved the shows on the Breakaway, especially Rock of Ages. They have plenty of signs saying its a mature show (which it is) and be careful with kids. If you still brought your kids and were offended then you didn't do your homework. There are plenty of other shows to keep you busy and entertained. If you are a child of the 80's this show was made for you! We saw all the shows including the dinner circus show. The other reviews I read were spot on with the circus show (amazing entertainment but just okay food). It was well worth it for the entertainment.
This room has the best views in our opinion. Coming into and leaving ports is great. The amount of wind you get on your balcony depended on which way it was blowing. Sometimes it would be very windy and other times no wind at all. If you sat down or laid on a lounger, the wind was never an issue. It is a huge room and very nice.