My husband and I have been on 19 cruises overall. Mostly Royal Caribbean, one Princess, two Holland America, and seven Carnival. I can say without a doubt that Norwegian was the absolute worst cruise ever. Our first and last on Norwegian.
Pro: Cabin 9920 - great aft balcony
Cons: Food in all dining venues arrived cold, absolutely no customer service (never knew the name of room steward), dirty dishes left in cabin for 3 days, no bar service in restaurants or casino; buffet area totally out of control - not laid out well at all; the ship was so crowded and the pool areas tiny for the amount of people; pool deck was hot steel - must wear sandals at all times; ship was extremely smokey - all clothing reeked from it; one night in dining room while waiting to be served we decided to leave because 6 waiters stood around and did nothing - when we left there were two cleaning people in FULL HAZMAT SUITS cleaning up something and we had to walk right through it.
Only good thing of the cruise. Huge balcony.