The apt was great. It's on the second floor and the apt has a lift. The location is unbeatable as it seem like your at the center of historic area making it easy to walk everywhere. We loved the easy walk to Trastevere for dinner every night. The area also has a market very close for all your basic needs and more. You also have Sant' Eustachio Caffee (great stop for coffee and breakfast in the morning) and Antica Salumeria (great sandwiches in front of the Pantheon) which are great in the morning to get a quick and delicious breakfast or lunch without having to figure out all the details.
The location is so close to the Pantheon that of course there is a lot of foot traffic from 10:00-23:00 pm right outside your window. Which should be expected and really part of the fun of being in Rome. However the noise of the street sweeping and trash collection between 1:00-4:00 was frustrating in the front bedroom. I used a rain app on my phone to help some. The back bedroom is off the street and the noise isn't an issue. However there is no window that you can open in the back either.
I found the beds and pillows too firm for my liking. Thankful I did bring my own pillow. The back bedroom has a wardrobe for your clothes but in the front bedroom you are only given a bookcase to stack your clothes on. Not ideal.