We cruised to the Norwegian Fjords
My experience is that every cruise is a joy, some more or less in a category. I therefore rate against average and do not feel comfortable at guessing at what the stars really mean.
This cruise was above average for crew friendliness and helpfulness. Even the mostly hidden kitchen crew and below deck engineering crew were happy to smile and greet you
Like others have said before, when you get back home the first thing we did was go shopping for a new mattress to try and duplicate what this ship offers. The problem is that when you return to your stateroom if you sit down on the bed it is so comfortable that you don't want to get up again even to go eat.