We were greeted pleasantly by Amen's husband who was waiting for us in the apartment when we arrived. He explained how everything worked and handed us our keys.
*Fellow AirBnBers: Please be advised that if you have difficulty walking or have to carry heavy suitcases, the apartment is several flights of stairs up with no elevator (we only had carry-ons so it was no problem, and we felt safer leaving our belongings in an apartment on a higher floor during the day). But this may be something to consider.
The place was perfectly located for our research conference: 5-10 minutes walk from Sapienza University of Rome, 20 minutes walk from Roma Termini train station (the Leonardo Express (LE) takes 32 minutes to reach Fiumicino (FCO) airport from there), and a half-hour walk from the Colosseum.
The apartment was immaculately clean with all of the requirements of a basic kitchen (including sugar, salt, etc). A small supermarket is less than 3 minutes walk away next to the park. Overall, we had a very relaxing stay here & would be happy to visit Amen's apartment again!!