We have cruised 35+ times, majority RCL and Celebrity.
Embarkation was a breeze, really like the new terminal and how fast you go thru and get on the ship. We experienced this with our last RCL cruise at Miami's new RCL terminal also.
Cabin: We were in an Infinite Balcony, deck 7 mid ship. We loved the cabin design/decor, and absolutely love the roll down balcony. The cabin feels much more spacious. The bathroom was very nicely done as well. Lot's more storage, and a much cleaner feel.