I think the only people who would even have the physical ability to break into your car would be other passengers, or people who work in the garage/terminal, since you have to pass through security checkpoints to get into the area where the garage is, and then have to also pay up front if you're driving into the garage. I'd also be shocked if there wasn't a ton of surveillance video cameras all over the place (I didn't specifically look for or notice any when we were there), considering that the parking garage is extremely close to the terminal building, and attached to it by an elevated walkway. In terms of parking garages, I think it's probably one of the most safe/secure ones that you're likely to come across. I wouldn't go leaving a $5,000 diamond ring in the car during a cruise, but so long as you're following reasonable precautions (locking your doors, not leaving obviously valuable items out in plain view, etc.), I wouldn't be too worried.
