This airbnb is absolutely amazing! I lived here for one month (mid August to mid September), and I genuinely felt entirely at home, here. Since some of the other comments are a bit old, I wanted to provide more detail about how the unit is as of 2021:
1. The layout is much bigger than the photos imply. The house is stocked with everything you need to live here comfortable (lots of extra towels, linens, blankets, cookware) to the point where it immediately feels like it's your home. In terms of temperature, the apartment is a bit below street level, which gives it a naturally cool feel. There are also windows on both sides of the apartment, so air circulated quickly when both were open at the same time.
2. The WIFI is fiber-optic, and it was around 10-12 speed internet (which is amazing for Rome). I worked remotely with daily video calls with little issue.
3. I pretty much walked all around Rome with ease except for taking transport to the Vatican (which could have been walked given more time). The farthest I walked was 52 minutes, but that was essentially to the other side of Rome; most places were within a lovely 30 minute walk.
4. It's well-placed in the Trastevere in a relatively quite location since it's a bit away from the social drinking sections. There are also 3 major grocery stores within easy walking distance, and lovely fruit stands and mini markets everywhere. Check out the Trastevere Sunday Market! It's about 3 min walk from the apartment.