We have parked there 3 times. December 2006 , March 2007 and last month.
Very safe and very convenient.
You literally turn right, go up the ramp, pay for your parking $14 per day,
(cash or credit card~~we always use our credit card...but we have cash available in case the machine is down), you drive up and the porters unload your luggage on a COVERED floor (level3) and then send you on your way to park. You take the elevator back down to Level 2 to check in.
In December it was pouring rain, and we never got a drop on us from arriving to getting on the ship!!!