This is a nice, spacious apartment in a fairly quiet part of Rome. I say quiet (because it is inside!), but San Lorenzo is known for being an area long popular with local students so it has plenty of affordable bars, restaurants, music and so on. So it's more lively in the evenings and towards the weekend.
It is a decent walk to Termini, but the apartment is not so far from bus or tram stops so it's easy enough to get to other parts of the city.
Before coming to Italy, I'd be staying in some Air BnB in Japan so it was nice to be reminded how much larger European apartments are! There are high ceilings, plenty of room for storage, a decent kitchen. Check-in and the rest were all painless.