We took the Western Med cruise from Barcelona at the end of June, 2006. The Norwegian Jewel is a new ship, less than a year old, and is a wonderful ship in excellent condition. It is also a huge ship, carrying over 2,000 passengers plus a crew exceeding 1,000.
Here are some observations:
The ship is so large that we had almost no sensation of being at sea, even when it was moving at 20 knots. Admittedly, sea conditions were excellent during our cruise, but I would recommend this ship to those who worry about seasickness. There is virtually no engine noise or vibration. I used to look out the stateroom window to see if we were moving or stopped.