The good: convenient location that is close to all the Rome good stuff. Easily walk to the Forum, Colosseum, Vatican, etc... Lots of restaurants just steps away, apartment is relatively quiet, though you can hear other residents of the building clonking up and down the steps outside. Not too big a deal though. The apartment is indeed a space house, and looks like something out of A Clockwork Orange and 2001: A Space Odyssey. Super neat design touches and style. Everything you need for a short or long stay including full kitchen and washer/dryer. Things to note: it takes a LONG TIME to heat the place up, so if it’s winter then ask them to turn the heat on before you get there. I arrived at 4pm in early February and it was cold as heck in there and by 10PM it was still only 17c/63f. So yeah, ask them to turn the heat on the day before. It’s also not really “on” Piazza Navona. It’s about 3 blocks away, but that’s a good thing because Piazza Navona is a loud nightmare, you wouldn’t want to try to sleep next to that. Aside from that there were no major issues with the place. A good, albeit quirky, central location with style.