After spending many hours researching our Alaskan cruise by reading other reviews, I knew I had to write my own review at the conclusion of the trip. So, here's my report which will focus on the ship and the excursions, none of which were booked through Carnival.
We overpaid for the airport transfer but only realized that after we'd booked and no refunds were allowed. Even though it was expensive, it worked flawlessly with minimal waiting at the airport and our bags showed up at our cabin, so not many complaints there.
Boarding the ship went pretty well. We got on around 2:00 (4:00 departure) and had printed all of our documents in advance. The entire process was about 30 minutes. Our cabin was a 7A type (#5175) and the view was considered partially blocked but it really wasn't bad at all. I would recommend this if someone is looking to save a few hundred bucks.
Good location for those that are prone to sea sickness. The obstructed view was not bad as the boats were below us. Here's a picture from our room looking out: http://sphotos-a.xx.fbcdn.net/hphotos-ash4/s720x720/384046_10151239182210917_904860507_n.jpg
Just look out, not down. Only the antennae from the lifeboat got in the way of a handful of pictures.
We had 3 people in the room and while not spacious was definitely adequate.