OK - we had never been on a cruise and we weren't too sure that cruising suited us. but we wanted to see the Inside Passage.
We chose the Norwegian Sun because the dates suited and because we were attracted to a casual cruise. We weren't interested in dressing up and we weren't interested in fixed meals (potentially trapped with people we really didn't want to spend dinners with). So, I suspect we weren't the average customer?
Anyway, our balcony room was great. A good space, comfortable bed and settee and good facvilities. The balcony chairs aren't great, but they suffice.
The casual approach suited us. Food for breakfast and lunch is fine. The large outdoor space aft is great for casual lunches. WE tried both the large dining rooms and the specialty restaurants. For a few dollars, the specialty restaurants give a better ambiance and service and some interesting meals.
The ship never felt "full" (though it was). You could typically get seats in bars and always in specialty restaurants (except the small Teppanyaki). We checked some of the entertainment, which seemed quite good to us, though we didn't feel that we had to attend every night (the shows are very popular). Staff are friendly and very helpful.
The star is the scenery. The captain did a fantastic job getting us close to towering glaciers and drifting through narrow passages, as orcas lazily cruised below us.
We thought the cruise delivered on its promise and was good value.