This is a late review of our experience on the last Alaska sailing of the inaugural year. My wife and I traveled with our young sons (older turned 3 on the ship and younger was 16 months). We had not thought ourselves as "cruise type people" and were going as there wasn't another practical way for us to see Alaska with the children and for the Disney experience for the kids. Now-we're hooked.
Pros:
Embarkation/debarkation-At least for Vancouver, the "port arrival times" assigned on the website didn't mean anything. We got an arrival time at 2:30 but showed up at noon, waited maybe twenty minutes and then walked on the boat. You have the chance to get the first of many pictures with The Mouse while waiting. Debarkation was easy for us; we just kept our luggage and walked right off the ship when they opened the doors. The lines to collect luggage looked a bit misearable, so I would highly recommend the "do it yourself" option.