My extended family and I (13 of us in 6 different staterooms) returned this morning to Port Canaveral after a three night cruise on the Sensation. To validify my negative comments, please note that between us, we have well over 100 cruises, (7 in the past year) 80% of which have been on Carnival. Therefore, I feel our opinions are surely entitled to serious consideration. I offer them to you to provide an accurate portrayal.
I personally found the Sensation to be a terrible ship for the following reasons: its air-conditioning simply couldn't keep up with the need: the dining rooms were hot; the Seaview Grill was hot; the staterooms were hot. Staff was very aware of the issues but had no explanation and no solution except that we were eventually provided with a box fan from the Purser's Desk for our stateroom. I suppose we should have become concerned when immediately before we were to embark, several people were asking for refunds, wishing to get off.
Overall, our staterooms were OK. However, the bathroom walls were filthy with stains (some of which appeared to be ***) and mold. The carpet was simply nasty.
The room service, dining service and food, as well as on-board activities were fine. BEWARE: if you like a sparkly clean ship, the Sensation is not the ship for you. I felt like it was simply a bottom feeder of the fleet. I prefer the Glory, Fantasy, Ecstasy, etc.