Of course this ship is majestic, the shows are great and the neighbourhoods incredible, so Ill just focus in the few considerations a future passenger should keep in mind:
Smoking: Almost all the ship is smoke free, something that really pleases me. If you have electronic cigarets take in consideration that they´re forbidden, just the same, which I find over restrictive. On the other hand, the Casino will make you feel in Vegas, because smoking is allowed- in half of it. They have this silly regulation in which the port side is a smoking zone and the starboard side isn´t without any division, wall, glass or anything, so you still get all the smoke and the smell.
Crowds: I understand that New Year´s week is the highest week of all, and I heard that, counting children, we were more that 6 thousand passengers. The first night, it took us 45 minutes to get a dinner table; the elevators just weren´t enough, with all the strollers and wheel chairs. The gym was always at full capacity, unless you like to exercise at 6:00 am or 10:00 pm.
My time dinning: The first few cruises where this system was offered, it was a great choice. You had a table always waiting for you. Now I strongly advise against it. With so many people having My Time Dinning, you have to wait between 10 and 20 minutes for your table, and you get different table and waiters every day. Those who have a prefixed sitting, always know what to expect.
Dress code: Dress however you like. They say that shorts and flip-flops are not allowed in the main Dinning Room. They say there are 2 formal nights. When one of those formal nights is New Years Eve, you could expect black ties and glittering dresses. Some passengers did dressed up, but shorts and flip flop were also allowed and they´re only consequence was an eventual displeased glance.
Specialties restaurants: If you want to try one, book it a month or so in advance, if you travel in a high season. Otherwise, they´ll be fully booked the first day.
Disembark: I understand this is not the ship´s fault, but be prepared for a 2 hour process, always standing.