The Good: apartment is very spacious and clean. Beds are comfortable. Private parking included. Host was mostly friendly and responsive although we did have a misunderstanding (read below).
The Bad: the location is not good. The neighborhood is not appealing, a lot of garbage on the streets and at night we didn't feel safe walking around in the dark streets. Other reviewers had the same comment. To get to the center of Rome (Coliseum, Forum, etc) you need to get on a very crowded subway that takes 40mins from the apartment to get there. The station to its credit is close to the apartment. Also, we had a problem with one toilet that didn't work properly. Lastly, we were not aware that there was a city tax of 3.50 per person per night. For our group of four for three nights was 42 euros extra that were NOT INCLUDED in the Airbnb total and wasn't mentioned anywhere in the listing. Hopefully the host adds that in. Has to be paid in cash to the host.