If you're used to spending your holidays in the hands of Celebrity or better cruise lines, I would not recommend you try Norwegian because you'll be disappointed several times per hour.
Their processes are efficient and streamlined, but the quality of everything on board is rather poor. We found it took us more than half hour to find a place to sit in the garden cafe since the weather wasn't good and everyone was trying to eat there. Once we found an empty table, it seemed rude not to offer the two extra rooms to other passengers who were also waiting, and the experience turned out more of a school cafeteria in a rush than a vacation. There was nothing wrong with those other people, they were as hungry as we were! Other nights we were refused from all dining rooms since they were full. I realize the whole ethos of this line is based around "Freedom" and being "Free to choose" whenever and whenever you want to eat, but on the Norwegian Gem there just aren't enough seats for every passenger indoors when the ship is full and the weather outside is rainy. Yes, you can always go and pick up some poorly prepared items at the buffet and eat standing up, or room service has a delivery charge. I can go on and on about how the dishes elegantly described in their dining room menus were shockingly disappointing once they arrived at the table. Presentation was rather good to mask the poor quality of ingredients/preparation. The first night we were pretty sure that the steak had been pumped with something to make it fluffier and cooked on a george foreman grill. It tasted fine but the texture was artificial. Didn't order that again.
The entertainment was wholesome and included several acts with one man and his guitar, as well as dance sketches from the ship dancing crew and an acrobatics show that was very good in athleticism but had very poor production and artistry. Since we felt like we were trapped at a suburban mall on this Norwegian Gem ship while traveling from port to port, we did the best we could, relaxed and tried to find the positive aspects. However, if you think it's going to be like their brochures and videos promise, beware it will likely not be like that. Also it was a bit shocking that smoking was allowed in the casino, so passing through isn't pleasant if you are allergic to cigarrette smoke.
The cabin had everthing and everything worked well. However, the layout with a rather large corner table made it very hard to get in and out of bed. This table was unnecessarily large.