The apartment is fantastically located, near many great attractions, and yet it is quiet. Was big enough and very comfortable for our family of 5. The kitchen is a great size.
I would highly recommend staying at via Belsiana 90, and then I would like to add that we found a wonderful local guide on the WITH LOCALS platform, called Amandio, who brought the City of Rome alive for us. The combination of the great apartment and our super guide, left us with great lasting memories of the Eternal City.