This was our first cruise on Disney, and the first that we've taken with our 4-year old at all. We thought that the shorter duration would give us a chance to see if there were any issues (seasickness, etc.) with our little one traveling with us. Our mistake - no problems at all with her, other than the fact that the cruise was just TOO SHORT! Three days was just enough to get comfortable on the ship - and then we had to get off!
Having traveled on a number of lines in the past, I must say that I was quite impressed with the embarkation process - we pre-registered on the Disney website, drove ourselves to the port, and walked right into the terminal on the third floor pedestrian bridge. Once inside, what seemed like a madhouse turned out to be a well-oiled machine. Within 10 minutes, we were through the check in line, and, since our boarding group had already been called, we walked right on and were announced to the ship.
The accomodations were fine - a standard balcony room with a pullman bed for the 4-year old (which had a nighttime sky and Peter Pan constellations painted on the ceiling). Our room steward was very attentive and even left the pullman down for us so that we could use it for naps.
Nice cabin, near forward stairs and a little noisy, but generally good. Split bathrooms were nice.