The Ship - Norwegian Epic (one of the world's largest) the advantage of a large ship is there are more choices. More restaurants, more entertainment choices, more deck space. The disadvantage is, of course, more people. We thought that the boat was big enough that the number of people didn't make much of a difference. But, it is not a very intimate experience. For example, if you meet someone at dinner, with 4,000 people on the ship there is a good chance you will never see them again.
Another advantage is that when you are in port you can look at the other ships and confidently say - "My ship is bigger than your ship ". Note: calling this a ship is generous. It is really a floating hotel that can travel 20 knots/hour on water.
The Entertainment - Blue Man Group, Cirque de Soleil, Second City Improv., a great Blues Band, an extremely entertaining dueling piano show, a murder mystery show and more. Of course there were most of the other traditional entertainment things, but we didn't do any of that preferring to sit in the sun.
The Food- all cuisines, all the time, The quality was good - service attentive - venues nicely appointed.
The Activities - we didn't do much more than sit in the sun, or move to the shade and take an occasional dip or hot tub soak but there were many more options. Full fitness center, water slides, basketball court, climbing wall, bungie/tampoline jump, rappelling, walking/running track, etc, not to mention the bingo, dating game and other mindless stuff.
You just make your own choices. We hardly ever have more than one drink per day although some chose to start imbibing shortly after breakfast. Many seemed to be enjoying the casino we only walked through on our way elsewhere.
The ship departed at 4pm after we had our mandatory escape drill. Sailing out of Miami is quite nice. The rest of the evening was spent having dinner and acquainting ourselves with the ship.