This place is in an incredibly central location right around the corner from Trevi Fountain and easily walkable to the Colosseum, Pantheon, and metro station. Check in was quick and easy and the apartment was clean and well stocked with towels and toiletries. Bed was comfortable although the pillows are pretty lumpy. The #1 thing to know is that because of the location, the street outside the window is loud, and on Friday and Saturday nights it didn't seem to quiet down until after 2am. One of the cafes below seems to stay open 24/7 so you'll hear people there if the window is open. I recommend earplugs if you can't sleep with noise. WiFi had problems as soon as I checked in and throughout the stay, but iFlat brought a new wifi device the next day that worked decently through the rest of our stay. Since you are so close to the fountain I recommend trying to get out there around 2-3am if you want to take pictures without anyone else in them.