Great location, very near to Pza Navona and other sites. Really lively area, several options for shopping and dining.
The check in process is a bit unrealistic. There is a charge, in cash, for arrival after 8pm, then an additional charge for arrival after 11pm, so if your flight is delayed, be prepared. If you don't have data roaming or WiFi, which can be tough to sort on arrival in a foreign country, message from the airport. I messaged enroute from the airport but waited about 45 mins on the doorstep for someone. Not ideal as a lone female traveler to stand outside on the doorstep at night waiting for someone you don't know. A keyless entry would easily suit this accommodation.
Not ideal for young families, people who are unfit, people with accessibility issues, or those with a lot of luggage. With no elevators, you have to climb many, many, many steps to get to the apartment. With one hand luggage it was a struggle, b/c it was heavy, so if you have several cases, be prepared.
The apt is lovely, clean, well lit, with great sitting areas. Didn't see enough toiletries. No shower gel, just shampoo and a small hand soap. No kitchen towels if you spill anything in the kitchen, so had to use one of the hand towels provided.
Couldn't find any pictures on the TV, just audio. Worked fine as I was out most of the time, but sometimes you want to watch an international news broadcast to stay abreast of any happenings.