Thanks for the advice. I appreciate it. I will say, if your ship is one doing the two days stop at Perfect Day I definitely don't recommend the key. You'll be doing too much off the ship to get any use out of it. I mean, don't get me wrong, the lunch was fantastic, so was the a la carte breakfast, but nothing the Windjammer couldn't meet my need with.
Our cruise on Navigator was Perfect Day, Nassau, then Perfect Day. There was no day at sea so to speak. Because of this, all the 1 hour activities that the key was supposed to provide us were all at times we were off the ship.
If your price for the key is $19.99 per day like ours was then it could be worth it if you are needing internet, but there again, we didn't really use it at all. But that's just my two cents. Have a great time on the Mariner!!!