I have been on over 10 NCL cruises. All have been on the larger ships as I enjoy have the option of a studio cabin. Lately, I have been traveling with friends, so 2 or 3 cabins are used.
The cabins were fine. They spa colors are a nice change. The layout was a bit rough for us, as it was super difficult to get to the closet (there is a couch blocking access). The bathroom was a perfect size for a boat.
We have enjoyed the new observation area on other ships, and this one is no exception. Its a nice getaway from the bustle of the rest of the ship.