I didn't meet Maria Teresa. However, she connected me with a very nice couple who did my check in. They were amazing, and helped with everything I needed during my stay. Andrea is very sweet. She went with me to a beautiful park close by, and gave me a lot of tips about Rome. She even woke up 3:30am to ensure that I get safely to the airport by taxi.
The apartment was very clean, confortable and close to the subway. Definitely it was a good choice.
Thanks Maria Teresa, Andrea and Horacio!!