I've only been on 9 cruises, so I may not know it all but this is my experience on the NCL Breakaway:
I booked this cruise for a group or family and friends against my true desires to sail on NCL again. The first time with NCL was the Hawaiian cruise in 2007 - it was not good either.
1) Staff- NOT the friendliest as other ships. They do their job, but that's it. No going the extra mile to cater to their passengers. You are a number, nothing else. Except for a handful of people, including my room steward who I only saw 3 times, when we boarded, when we needed a laundry order form and when we left, and a couple of people on guest services.
Beautiful city with lots of amazing spots to visit. Be prepared to pay a hefty price on tap water! Stay away from the busy central station hotels in the area if you want peace and quiet.