We absolutely loved our stay, we would definitely do it again, however, the location of the apartment was not ideal. At night/in the evening when walking back we (2 females of 18) did not feel very safe :/ However, all hotels etc in the termini area will have this. The location was great during the day though, not too far from the busses and the metro and also not too far from some cozy and cute restaurants. The water pressure was a bit low during showers, but it was completely doable :)
The host is amazing. Whenever there was a problem (e.g. we ran out of toilet paper or the shower had to be fixed) she would reply instantly and the next morning (we texted in the evening) it would be done :) She also answered all questions we had, for example where to buy after sun (at the pharmacy) and what their favorite restaurants are.