I stayed at Tinkerbell with my family (4 couples, 2 kids and 1 infant) and we had a great time. Manuela’s place a really nice and cozy apartment with four decent sized rooms, each with attached bathroom and air conditioning. The apartment was clean and nicely decorated. It also has a common area, which was the best part according to my parents. I did not have the opportunity to meet Manuela but she seemed very easy going and accommodating. I needed her to check-in my sister who was arriving earlier than me and she was happy to allow that. The apartment is located in a quiet area which provides a good relief from the more touristy parts of Rome. There are nice restaurants and bars nearby and there is a general store on the ground floor of the building where you can get your basic stuff. The building has a lift but it's the smallest one I've ever seen. So if you are coming with many people and luggage then be prepared for several trips.
Carlos was really helpful with his advice and helped us book cabs to the airport. Breakfast was provided every morning and apartment was cleaned daily. Overall, it is a great apartment, especially for families, and I definitely recommend staying here.