Hi. We have sailed many mass market lines and this was my second Celebrity cruise.
We arrived one day early and stayed at the Embassy Suites on 17th Street. Nice place. Ate at Carlos & Pepe's and the food was good and margaritas fantastic. Publix, wine store, restaurants, etc. in very close walking distance.
Others from my family arrived at FLL at 9am and headed right to the port. Boarding ended up being delayed until after 1pm. The people in the terminal were told it was an immigration issue. My friend & I arrived at the terminal around 1:40 to no line at security check. My glass and plastic bottles were inspected (seltzer was in some--unopened, and 2 bottles of champagne). No line for check in either! Woohoo. Meanwhile we asked employees why embarkation was so delayed and they said there was a group of passengers who would not get off the ship from the previous cruise! Surprising, yet it did explain why we saw people outside the cruise terminal getting into taxis with their luggage at 1:45 (late!). If customs/immigration had been the sole cause of the delayed boarding, all subsequent boardings would be delayed as well, and that has not been the case. So hopefully this was a one-time incident.