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.
The specialty restaurants were pretty much the same as the other ships. We tried the sushi bar and it wasn't bad and not stunning either. Compared to what you pay for sushi in the NYC area it was a deal….but then always be careful with getting good deals on sushi! Ocean Blue was very nice. We enjoyed the atmosphere and the food there.
I did the water slides (all of them). The slide where the floor drops out from underneath you was definitely the best. The ropes course was great for beginners and was fun to do but if you have done other ropes courses, you will get board with it pretty quickly.
We tried almost all the bars. We really enjoyed the waterfront bars. It was great to grab a drink sitting on your stool and watching the ocean go by. The Ice Bar is a glorified meat locker. It was one of those things you would want to try once but nothing spectacular. If you are a craft beer fan, the only place to get Brooklyn Lager on tap is at the back of the ship (hidden in the open air garden cafe bar). You can get it in bottles at O'Sheehans but a lot of the bars did not have it. The Prime Meridian Bar is a nice quite bar to grab a drink. The lobster tails (the pastry) in the Atrium Cafe are fantastic.
Overall we really had a great time on the Breakaway. We didn't have any real complaints and found the service and friendliness of the staff to be great.