Just back from the Sensation and as requested by Ken, here is my update.
Lois: 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.
I had no problem with the A/C in my room. In fact, my cabin was so cool, that I turned the vent to almost closed when I got into my cabin at night. (I keep my home a/c at 72). However, others I traveled with did have a problem keeping their cabins cooled. It was about 50/50 out of the 6 cabins. The Seaview was warm, but it was very warm outside. I did not notice any problem with temperature in the dining room.
Lois:
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.
I had no problem with the cleanliness of my room. I also had no problem with the cleanliness of the rest of the ship. The carpet in many areas was worn, but you constantly saw the crew cleaning. I did notice that sewage type odor, that is mentioned occasionally by other posters, when I first boarded the ship, but I did not notice it for the remainder of the cruise.
The food and service in the dining room was spectacular as always. I was somewhat disappointed in the food and the service in the Seaview. In particular, you often had to clear a table to sit at them and locate your own silverware. I don't necessarily have a problem doing that, just not what I'm use to with Carnival and I'm sure what they intend.
In the past on Carnival, I have always found the crew, particularly the bartenders to be very friendly and go out of their way to take care of you and I found that type of hospitality, not only from the bartenders, lacking on this cruise.
The entertainment was excellent. I've seen the shows before and they were worth seeing again. Although, I am hopeful that next time I sail the Sensation, they will have rotated some new acts on board.
Blood Power (Band) in Michaelangelo's lounge is awesome and not to be missed.
Overall, it was another great cruise and I will not hesitate to go back, but I just did not feel that same Carnival warmness that I have felt in the past.