The NCL Sky is a fun, active, no-rest, party cruise. We were on the Monday - Friday 4 day cruise with stops in Grand Bahama Island (Freeport), Nassau and the NCL private Island.
This cruise is similar to other NCL cruises I have been on. They joyfully welcome you on a red carpet with fun Caribbean music playing. The buffet and the bars are open. Since this is a shorter cruise, the demographics seemed a little younger (20s, 30s, 40s) and there were more groups than just couples and families. There were not many children on this ship.
Entertainment: The entertainment highlight of any NCL cruise is the White Hot Dance Party that gets started at 11pm. Note there are NO formal nights on this short itinerary. Also, the first day has a Pub Crawl with a visit and drink at each bar on the ship. (This paragraph should tell you all you need to know about the culture of this ship.) Fun, fun, fun!
The other entertainment was fun. There were pool games, contestant shows, piano bar, band, atrium music, comedian, etc. The casino is small and a bit smoky but functional.
Rooms: I read a few of the other reviews posted and I can confirm the following points. The rooms are VERY SMALL. We had an inside mid-ship room. The bed was about 4 inches from the dresser. I had to roll across the bed to get around the room. It you need more room, be sure to take a hard look at the room type you are booking.
It is true that each passenger gets 2 pillows: 1 flat and 1 large. It is kind of like goldilocks. We would have preferred the "middle" option. The sheets were nice and the bed was comfortable. The cabin steward/stewardess staff is excellent and clean your 2 times per day. Even though the rooms are small, the care and cleaning keep it picked up and the clutter never gets out of control.
It is true that they provide shampoo and body wash in dispensers on the wall of the shower. Conditioner, lotion and bar soap are not provided. It you need this, bring it with you. (This is true on the other NCL ships I have been on.)
Price: The key consideration for this cruise is the price. I have cruised 9 times on various cruise lines. This was the lowest price per day of any cruise I have been on (including other NCL ships). We paid $179 per person (not including tax) for an inside cabin and also got the soda package ($6.25 per day per person) and a free bottle of house wine (street value < $10 -- to buy on the ship was $25).
For the price, this is an excellent deal. I would do it again in a heartbeat!