We have also had late seating on our trips and are once again booked for the second seating. We really, really like this option. First of all you aren't rushed to get ready for dinner. We usually dress in time for the show, sometimes DW & DD need time in between, but not usually. After the show we (a family of 5) will go to Rockin Bar D and catch the Caberet act, which all of us have enjoyed imensely. Or we've played some shuffle board, my kids like this a lot and bug us all week to play.
It also seems to us that the actual meal is less rushed, since they don't have to set up for another seating. We are able to spend a lot of time over the meal enjoying each other's company and getting to know our serving team. We are usually some of the last people to leave the dining room.
The other benefit is that you get the late seating for breakfast on debarkation day. Not being a big morning person, I like this a lot. I think the early time is 6:30 am and the late is 8:30. By the time we have breakfast and say goodbye to our table mates and servers, the line to leave the ship is non-existent and we walk right off. You just have to make sure your departing flight isn't real early.
So we think second seating is a great choice. When we went on our first cruise in 2000, our youngest was only 4 and he has no touble keeping awake and having a blast. It just seems to be a more relaxed schedule.
Enjoy!