I just got back today from this cruise and it was great!
-We had excellent weather (not a single drop of rain), and not too hot.
-the Panama Canal was phenominal,
-most of the ports were a lot of fun (Acapulco was not one of my favorites),
-the boat is beautiful and spotless,
-the crew and staff is the best I've ever seen
-amazing shows and entertainment
As far as the swells, the roughest the water got was between Puerta Vallarta and Cabo...up to 18' swells. You can really feel the motion, but I don't know of anyone who was actually physically affected by it, the stabilizers cut down up to 90% of the movement (got that on the ship tour).
I hope to get up a trip report in the next week or two (waaaayyyy too many pictures to download ).