My first cruising experiences were with Disney, so I've had high standards from the beginning. The RCL Navigator was very close to Disney in quality, and head-and-shoulders above the Carnival Triumph- and Magic-class boats. (Life is too short to cruise Carnival... no matter how cheap.) I haven't been on the Norwegian lines in a while, so don't remember well enough to compare, but I think they're comparable. I've heard too many people say Princess is like Carnival, so I haven't even tried.
Pros:
* Ship is freshly refurbished, and in immaculate condition. Kept excruciatingly clean.
Just like the picture, except no curtain between bed and sofa, and no sofa table (you can bring in the one from the balcony if you really need one). There was a triangle of extra space (3' at widest) between the balcony curtain and the balcony, because the ship bowed out slightly. It was a great place to stow baggage if it didn't fit under the bed. Very quiet. Very.Around the corner from the elevator - so convenient! Great location for main dining room, Windjammer and ice rink; just step off the elevator. The theater and the largest lounge were on the other end of the ship, though.Lots of cubby holes to put your stuff, so, even though the cabin was small, we had enough storage.Bring an extension cord / surge protector for chargers, laptops, etc.