This was our sixth cruise and our second on Norwegian.
We really like the "freestyle" that is the Norwegian way. No bulky suits to pack, no dressing up for the sake of it. All in all, very relaxing.
Although the ship is huge (4200 passengers) there was enough space for us. We were able to get away from the crowded swimming pool areas in a variety of ways. Once you have worked out where everything is the ship is easy to get around. The only thing lacking in our view was a decent deck to walk around in the open; the jogging deck was effectively enclosed by the lifeboats and very dull.
Our cabin was somewhat quirky as the sink was in the main part of the cabin. A really quite unnecessary quirk in our opinion. Other than that, the cabin was adequate, the air conditioning was good, and it was serviced well. A decent balcony too. Being aft facing it was really very quiet as there was little passing "traffic".