Roberta's apartment is perfect, she is very kind and helpful. I stayed one week with my family 4 (2 kids) and we had everything in this apartment, bed is fine, kitchen has all stuff for cooking, sanitary stuff is perfect, clean and nice, there is Wifi and very good speed. Roberta has many nice book about Rome and some DVD and also small museum in this apartment :) . it is very close to metro station and accessible to shopping, restaurant, etc.
I highly recommend it!