How can you go wrong? It's FREE. So if you got a 1 dollar discount you are ahead of the game. It will in fact get you on a priority embarkation line, a few cocktails for free , a news letter offering discount cruises , priority disembarkation, and a few minor perks.
I can tell you that I had a horrible problem with a Norwegian cruise,not their fault, travel agency sold and new owners lost documents. Because documents were sent to a TA Norwegian didn't want to have anything to do with dealing with me directly. I called the Latitudes rep, who connected me with a supervisor, who solved my problem on the spot. It NEVER HURTS to be identified as a repeat customer. It's all pluses with no
minuses. Go for it and join.