Daniele's appartment is very well located, a few steps from a metro station connecting to several landmarks and one stop away from the Roma Termini train station (Which is itself a 15-minute walk from the appartment). There is a mini-market next door, bigger grocery stores within reasonable walking distance and good restaurants in the neighbourhood.
Instructions on how to get to the appartment were clear and Daniele greeted us for the check-in, despite our flight being delayed a bit. While we did not need direct assistance during our stay, he did let us know that he would be available if needed.
The appartment was clean and there was plenty of room for a family of four. The air conditioned was greatly appreciated as it was very warm in Rome when we were there.
One thing to consider before booking: The appartment is on the fifth floor, and while there is an elevator, it is and old-style European one with manual doors, and if the previous user did not close them properly you may not be able to call it. This actually happened to us after a long walking day! We were fine with climbing all the stairs, but it may not be the case for everyone.
Overall, we had a great time! I would definitely choose that appartment again. Grazie mille Daniele!