As other reviews cover things pretty well I’ll limit myself to one general recommendation. Depending on what you might be accustomed to, Rome, while endlessly enchanting, is a very noisy city: bring heavy-duty earplugs for the sleeping hours. While you have to expect a certain amount of general big-city background din anywhere in the city, I had a bit of bad luck with some leaf blowers working the street below after midnight on two nights, and seriously loud maintenance work on the above-ground tracks just opposite the building using heavy machinery from midnight to 2am+ on multiple nights. You really need earplugs PLUS military-grade hearing protection to effectively deal with those kinds of a situations. But this was just the (bad) luck-of-the-draw. Otherwise, no complaints!