The location is ideal; in Trastevere, but you are quickly across the Tiber via foot, tram, bus or taxi (all options just a block away).
We found the flat to be more than sufficient space for us (2 adults). Besides the bed, there is a large sofa, several chairs, and a dining table to get comfy at. Electric plugs are where you need them. Storage wasn't a problem and Paolo has nice touches around the flat making it feel like a home and not a hotel.
The kitchen is small, but workable. The flat has dishes, pans, electric kettle, etc. We cooked a few nights. There is no dishwasher, but there is a laundry/washing machine (which was quiet and quick).
Towels, linen, soap, etc were provided as were a section of spices, food, coffee; we used some and left some. The wifi signal was strong and solid. We had plenty of hot water and good water pressure.
The flat is on a smaller street, ground-level so we had some outside noise, but nothing bothersome. The ability to just walk out your door and be in Roma was priceless. Markets, restaurants, and everything else you need are just around the corner.