The apartment was really spacious, clean and the beds are comfy. It has a very traditional/antique style as described on the pictures. It can be a little dark but not an issue. From the bedroom balcony/window you can see the old courtyard and well, not something you'll see if you stay in a hotel.
It is very conveniently located, coop supermarket and metro station Barberin are just a few minutes walk. Bar/restaurants right downstairs but the apartment is quiet.
We didn't meet Andrea but he arranged his friend to receive us when we arrive the apartment. He waited for us at street level and showed us everything we need to know about our stay. During our stay there were a couple of minor issues (AC remote out of battery, boiler jumped due to low pressure) but Andrea organised the fix immediately the next morning.
If you want a better stock supermarket with fresh seafood counter, the coop off Via del Tritone (the main road parallel to Via degli Avignonesi where the apt is located) has a good size seafood counter and is better stocked with Aperol Spritz, very important :-) Otherwise, the closest coop on the way towards the Trevi Fountain is only 3mins walk.