I was on this cruise also and although the ship DID do quite a bit of rocking back and forth we still had a great time. The extra day in Cozumel was absolutely wonderful. I also heard the loud "boom" and was up on the lido deck when the black smoke started billowing out ..... needless to say,.,,,the staff was VERY interested in this. All in all...it was an OK trip but Carnival does need to work on the sewage smells on the Elation. Service was great but food was so-so! Next time I think we are going to go with RCCL!