Apartment was very large, very modern, very stylish and clean, the pictures barely do it justice - 3 large bedrooms all with queen beds, one had a small balcony with table and chairs. Large lounge / dining room and smallish kitchen from what I'm used to but probably quite big by Rome standards and was still very functional. Two modern bathrooms with big showers.
Francesco was quick to respond to any queries and his colleague Emilio waited out the front for us to arrive so we could drop off our bags as we arrived a few hours before the apartment had been cleaned.
In summary we found it to be a great apartment and the service was also top notch. Highly recommend.
PS It was about 35 min walk from Termini with our luggage and about 25 min brisk walk to the Colloseum (Google maps shows a 30 min walk).