The apartment is great, the host is very positive and friendly (sometimes I even thought she is willing to talk more than I wanted to, but I wouldn't say she is annoying, so it's okay).
The location does not look very safe (especially if you walk from Termini - railroad station to this place), but we didn't have any problems. Although we were a bit scared to walk far during night. Anyway if you prefer public transport or any other way of routing, then you wouldn't notice that problem. Metro station is very close, like 3 minutes walking.
Overall I can recommend that apartment - good deal for that money.