We were a party of 5 adults and 4 children that took a Christmas Cruise on the Celebrity Summit. I have been on several cruises before on Royal Caribbean, most recent being last Thanksgiving on the Freedom of the Seas. We were all located mid ship deck 8 in Concierge Class.
Boarding:
Smoothest, and quickest process I have ever experienced on a ship. We did arrive early, (11:00 am) and were among the first people to board. Being greeted with Champagne was a nice touch. We waited till 1 for our rooms to be ready (with a bottle of complimentary Champagne) dropped our carry-on's and headed to Old San Juan.