Because of all sea days, I broke down and purchased the Behind-The-Scenes ship tour. It cost $100 pp although the pre-cruise price was subsequently increased to $120. It is offered on three different sea days.    There was some confusion as to where to meet for the tour. The shore excursion tickets and the letter sent to your stateroom mentioned the meeting time (9:45 am) but nothing was mentioned about where. The night Celebrity app said to meet at Cellar Masters (Deck 5).