This was our first cruise with Celebrity (have only cruised with Royal Carribbean prior to this) and we found the cruise and almost everything about it to be top notch. Like all big ships there are a few things that always need improvement but overall our experience was exceptional and the few things that we found to be not quite up to par were really noticed by 2 people who are pretty picky people. We stayed Aqua Class and think this was the best way to go on the ship. The food and the service in Blu was amazing most nights (maybe there were a couple entrees that we didn't particularly care for) but other than that i cannot say enough wonderful things about the Food and Beverage Staff in Blu and how we were treated everyday. It was fantastic!
Another favorite eating spot on the ship for us was Aqua Spa Cafe by the Solarium pool area. The food was light and healthy and so we really enjoyed having this option to eat better.
Utilized the spa one day for 2 treatments and again it was amazing. The level and quality of of the treatments are top notch and worth the little extra price. We booked mainly private excursions but we did take the ship tour in Santorini for a portion of the day before we left them because they only spent an hour in Oia and we wanted to spend the whole day there. For the most part we thought the ships excursions were very expensive compared to booking privately with a small group of people and we were able to structure our tour the way we wanted it, instead of having to go with the itinerary that the Cruise Line structured.