We stayed here for 5 nights with two small children (5 & 2). The apartment is great, as described, and spacious, particularly the bedrooms. Gabriella provided a cot and the apartment has some books/games etc for children.
The kitchen is well equipped which was useful for us in the evenings. There were also two great cheap pizza places which did takeaway within seconds of the front door :O)
The location is a nice local neighbourhood (which was much nicer than its looks from photos on goo&le maps, a bit further from central Rome but that meant lots of non touristy cheap but good places to eat and buy food. Its a student type neighbourhood so lively and a bit noisy at night sometimes. We walked to the old town from the apartment (about 1/2 hour) or got the no 71 bus which stops close by and goes to the city centre close to Pantheon/ Trevi fountain etc . The tram line and metro are also in walking distance (5 -10mins). We got the tram to Porta San Paolo station when you can get to Ostia Antica. The metro line was good for getting to the Vatican.
Although we didn't get to meet Gabriella as she was sick, she was a great host and provided lots on info before we arrived and during our stay which was very helpful (Wifi in the apartment very good).
I would recommend staying here especially if you are in Rome for more than a couple of nights