We have boarded the Navigator in port of Civitavecchia -- all went smooth, fast and with a smile. Entering that amazing ship for the first time was an experience itself! As we arrived early, I had plenty of time to explore the boat before it got crowded. I did notice a slight drop in quality of the design and the materials used then in the Radiance class ships of RCCL, but this is a bigger ship so it did not hit me as a negative towards the Navigator.
The dislike of the main public areas is to few pools for such as huge ship and especially lack of the Solarium -- an indoor pool area where people can swim even in the cold weather or during the winter time cruises.
The main pool is large and cold, and there is one pool on the front that is adults only. There is also one huge hot tub in the closed SPA area, but if I have been on a winter cruise would actually have no options for swimming.