It's an open deck. We heard people (assuming kids) running back and forth on one day. This wouldn't stop me from booking those rooms again. We love the Panoramic Ocean View Suites.
There are two Hilton hotels at the Fiumicino airport, (Hilton and Hilton Garden Inn). We stayed at the Hilton Garden Inn the night before our cruise and had a transfer set up for the morning. It's about an hour drive.