Me and my family staid at Biagio's place for 3 nights.
The space is big, with 2 bedrooms and the living also turned into a sleeping place. You can easily host 6 people there with at least another one sleeping on the couch.
It is not central, but close to a tram that takes you straight to Termini, and 7 minutes from metro. You can find supermarkets and stores opened well into the night as well as restaurants and bars. It is a very lively area, though it does not look like it at first.
The host was very responsive, and had a smooth check-in and out process.
There are downsides too unfortunately.
The major one (and I saw others complain too) is the hot water. It comes very hot but when you want to set it a little colder, it simply becomes cold all the way. Very annoying when you have 6 people wanting to take a shower in the evening.
Then there's the issue of insufficient toilet paper and kitchen towels, at least in our case. The kitchen plates and cups all seem overused and not very clean. We also found some sockets not working and both TVs had some issue or another.
When we wanted to use a broom to clean the kitchen floor we found it locked behind a door on the balcony and had to squeeze through the metal grates to get to it.
There is not one thing that is a major turnoff (except the shower), but many little things that make the location seem... unkept and left a bit in disrepair. Were this not a superhost location, I might have let it pass, but in this case, I find it unacceptable.
The place has potential, but it needs a bit more care and attention.
In conclusion, if you can get over what i complained about, this is a perfectly adequate place to stay when spending a few days in Rome.