The flat is really great, we found all stuff we needed and more. Rosanna is very easygoing and answers quickly. The apartment is easy to reach by bus from Termini and is also close to city center (main attractions) with the same bus. Besides, by walking is not far from colesseum, around 30 minutes. The only thing we didn't know (not specified in the flat page description) at the time we booked is that the municipal fee was not included in the price and we had to pay in cash at the time of check-in.
The street a bit noisy at night, but to compensate the room was very fresh in spite of the hot weather.
We are happy with our staying, I recommend!