We loved this apartment! It is warm and inviting, clean, and just lovely all around. Some specifics:
Location: It's not in the center of touristy areas, which we loved. It's not as crowded to walk around the area, and a bit more residential. It's right near a university, so the vibe is a bit younger. It takes about 10 minutes to walk to/from the Policlinico metro stop.
Space: The apartment is spacious. The kitchen has a table and four chairs, and plenty of room to move around. We didn't do much cooking in there (only reheated things in the oven), but it seemed really well equipped. The bedroom is fairly large as well. There were three people in our group, so they pulled out one of the chair beds (it's like a sofa bed, but for a single bed instead of a queen). Even with the extra bed, there was room to leave our suitcases open on the floor and plenty of space to walk around. The bathroom is a bit tighter than the rest of the space, but even so two people who are friendly can move around at the same time. The shower is small, but I've experienced even smaller Italian showers, so this one felt roomy.
Cleanliness: This place was spotless. Like, not a hint of mildew in the shower, not a stray hair on the floor, not a crumb or hint of grease smell in the kitchen. The whole apartment smelled nice, but it wasn't just an air freshener plugged in (those give me headaches anyway). The whole place just smelled clean and nice. Even the sheets smelled nice and felt clean. It felt good to stay in a place that was as clean as my own home (I'm a clean freak).
Communication: The hosts were easy to communicate with. There wasn't a language barrier (I, unfortunately, do not speak Italian). We were late for the time we had arranged for check in and Stefania had to leave. But she was accommodating and had her son there to help us. He gave us a quick tour, and answered our questions about garbage (Italian garbage is confusing to us Americans, haha).
A few items of interest:
There's a pizza place one door down that we loved for quick dinners after a long day of walking around the city. It's called Non Solo Pizza. The proprietor Ermanno is fantastic, and his pizzas are delicious. He has pizza laid out that he'll heat up for you, but you can also ask him to make you a fresh round pizza to go. 4euros is a steal, and it only took about 10 minutes. Being next door to that place was fantastic.
Check out the park that's about a 20 minute walk. It's definitely not a tourist stop, but rather a lovely park with cool ruins that the locals enjoy. We took the Linea 19 tram from the apartment to V. le Regina Margherita/Nomentana stop (4th stop) and walked to Guttilla Alta Gelateria, got some fantastic gelato, and then walked through the park back to the apartment. It was a lovely outing that gave us a flavor for Italian life. A note on the gelateria: the first time we went was on a Sunday late afternoon and we waited in line for about 30 minutes. It was mayhem. We decided to give it another try because we loved the park so much (and since we were going to be in the neighborhood...); the second time was a Tuesday late afternoon and there was no line.
A few things to note about the apartment:
It's probably not a good fit for light sleepers. It's right across the street from a hospital, so there are ambulance sirens quite often. And the floor in the bedroom is really squeaky. I get up several times in the night to use the bathroom (it's a curse), and so sneaking across the squeaky, crackly floor and trying not to wake up my family was a trick. We were so tired from all the walking and touring we did, it ended up not being too big a problem. But I think it's worth noting.
The hot water tank is not huge and takes a long time to fill up. So if you're hoping for multiple people to take long showers back to back, that's not going to fly. We just had our kid shower at night, and then my husband and I took quick showers in the morning and it worked well.
There is not any air conditioning (at least not that we saw). We were there at the end of October, and it was still quite warm to us (in the high 70s F), but the lack of air conditioning was not a problem. We just opened up a couple of windows which created a cross draft and the place stayed cool. I can't speak to how comfortable it would be in warmer weather.
All in all, we loved this place. It was our favorite apartment out of the four we stayed in this trip throughout Italy. We highly recommend it.