Very convenient location, central, just next to Trevi fountain. The apartment is small but decent and enough for our needs as we just stayed one night and didn't plan on cooking there (the kitchen is quite small).
Be aware of following points though:
1) Check-in goes smoothly if you keep in mind to contact the right host as there are several. Each one of them can only be reached on specific days. If you try to contact the wrong one you may get a bit nervous as no replies will come or calls will work.
2) As some other travelers mentioned before: The mattress is very soft/worn out and could be changed for a new one.
3) Make sure the airconditioning works fine and that the exhaust tube is well connected. Ours was not and we found out only afterwards. We suffered an incredibly hot night as the machine was producing hot air instead of coolness. And that thing is overwhelmingly loud, not to recommend having it working when trying to sleep. Could also be replaced.