I recently sailed with my husband on the Norwegian Spirit 9/6/11 - 9/11/11... and this is our story:
I booked this trip for several reasons -
1) It was sailing during labor day week, which would enable me to only take 4 days off of work instead of 5, since Monday was a holiday.
The room was "adequate"
The beds are very hard and uncomfortable. They were not put together well, and had a very obvious gap between them. The chair was coming apart.
BE WARNED the room will rattle and shake during the night. Any light sleepers will be very disturbed.