HIdden hotel is close to the opera house and conveniently located near the Rome train station and Rome Metro. The room was nice, the staff at the sister hotel, were very helpful. The elevator is a bit wonky because it only works when the inner doors are closed manually. Luckily, most guests remember to close the doors, but if not, you are out of luck until someone does. I wasn't crazy about the card entry system everywhere, especially as only some of the units would light up, but everything worked great once you got used to that. My room was a bit noisy at night due to people in the adjacent building, not within the hotel, but everything seemed to quiet down by 10 PM.