We only had one day at sea during our New England and Canada cruise aboard the Norwegian Dawn. It would be the roughest part of the trip. The winds were screaming at 33 knots and the 12-foot waves overnight had the smaller Dawn rocking. Very few people made it out on deck but I'm not normal so I took the time to explore topside a bit more.
Inside was nice (and warmer!) and we took time out to enjoy a leisurely day of dining, movie watching, and shopping. At no point during the entire cruise on the Norwegian Dawn did we feel crowded or rushed. Peg called it our hotel that traveled with us.