Marissa and Remo's place is really nice. Very clean and the couple are very helpful in telling us where to go and what to do.
We enjoyed the fact that the place is very close to the Colloseum, about 5 minutes away. The place is very close to the train and bus stations as well, about 5 minutes walk to the bus station. We took bus number 64 everywhere. Their place is 10 to 15 minutes walk to Piaza Venecia. Make sure you get night tours for the visits to the spots near the plaza.
We would definitely use this place again the next time we visit.