We had some luck with our second Crystal experience. A combination of special offers/incentives and some fortunate timing resulted in bonuses including return business class travel to Mauritius and returning from Cape Town (from Canada) for $999 -- and a surprising last minute upgrade to the Penthouse level, with butler service and an extra-large stateroom. Then Crystal topped things off by advancing us three trips in the Crystal Society program, resulting in a milestone bonus (credited at Penthouse level) of $200 each -- meaning virtually all of our modest shipboard/excursion costs were covered.
The Penthouse gave us the opportunity to experience the butler service and constantly refilled wine (we could have had spirits if we preferred) in the stateroom, plus room service from Prego when we wished it. But even if didn't have these extras (which we certainly enjoyed), the services overall aboard the ship certainly met the standards of our first experience when we travelled in an ordinary verandah stateroom. There were extra sea days because of the cancelled Madagascar stop (because of the plague there), but the shipboard enrichment/programs were truly satisfactory. We also enjoyed Hanukah services with a guest rabbi and about 30 other Jewish people, some of whom ordered the kosher food service available with preplanning.
The only flaw: An unpleasant smell in the room a few days; staff certainly worked to try to resolve it. I'm not sure what caused the problem but it corrected itself by the time the voyage ended.