I did this cruise in January 2001. For a three day cruise in the middle of winter it was okay. Almost did it again in Oct 2004, but ended up going on a one week cruise in the Caribbean in August instead. The problem with a three day cruise is you board on day one. Day two you get to enjoy the entire day, however, that is a port day. Day three you have to pack and you return to the real world on the morning of the fourth day. When you go for a week, you get five solid days of nothing to worry about. Much more relaxing.
At any rate, you will be going in ten days, and I'll bet you will have a great time. Here are a couple of pictures to hold you over until then ...