We just came back from a 4 night Bahama cruise on the recently updated Mariner of the Seas. Some of the changes especially the aesthetic ones are absolutely stunning such as the Dinning Room and the Diamond Crown Lounge.
The new Skypad and water slide area were extremely inviting although we did not partake in the fun on this trip we would in the future.
Cocoa Cay is under construction but don't be put off by that. RCI has gone out of its way to assure that your day there is absolutely the best. We found it exciting to see the new dock work in progress as well as the the water slides.
We booked a balcony cabin as it was a short trip for us but we usually prefer a junior suite. We were pleasantly surprised at how roomy our cabin was and our cabin steward was very attentive.
check is was very smooth and disembarkation was a breeze