Please be advised there are two car services with almost the exact same name. The one that everyone seems to love on TA is Rome Cabs, I unfortunately booked through Rome Cab and had the following happen to us. My apologies as I mistakenly posted my experience on the wrong company. This was my post;
I have no idea what the deal was with this car service. I use tripadvisor to avoid exactly what happened to us. DO NOT USE ROME CAB FOR YOUR TRANSFERS. We had a flight delay getting into Roma which they did handle, but that was it. We were on a 7 day Seabourn cruise, got off the ship, no van (4 of us). Called them and 20 minutes later a Benz wagon showed up. We had luggage in our laps for the 1 hour ride into Roma. Booked them for a Vatican tour, driver was late, as was the guide. Tour guide did a good job with the tour. Called the day before leaving to confirm our VAN transfer @ 6:15 AM. We get out in front of the hotel, they NO SHOWED. The night manager at the Hotel delle Nazioni was very apologetic offered us a BK to-go bag and got us another car. I WOULD NOT USE ROME CAB FOR YOUR TRANSFERS.
Hope this helps, I wish someone had given me the heads up.