Having been on both five and six star lines, I have a pretty good idea of how a star rating should translate into the level of food, service, and accommodations on a ship. Despite my best efforts to truly appreciate Crystal, a few aspects of the above criteria were disappointing.
We (my wife and I) took this twelve day cruise in the Med mostly because of the great itinerary, which included half of every city in Europe we had ever hoped to see, and because the other lines rarely offer a Venice to Barcelona itinerary.
Initially we were very impressed, both by the staterooms, which are about 20% larger than what we're used to, and the friendliness of he staff, who try to get to know you rather than just saying "hello" as you pass by. In these two points, Crystal is great.