We stayed at Norka and Louis home for 4 nights, the place is cozy, very clean and everyone in the household is extremely friendly. There is an extra fridge in the rented room and you can use kitchen to cook something. Also during hot days we appreciated fan and air conditioner.
The only hitch is that hosts don't speak English (they speak Italian and Spanish), however don't be discouradged and download Italian to Google Translate. Its voice recognition works well and it helped us to understand each other.
Location is great, just 6 mins walk to metro station (blue line B) and it is only 4 stops to Colosseum. There is a grocery shop really close to the apartment and there are some places to eat in the neighbourhood, too.
In conclusion, I can say Norka's tidy home, her friendliness and hospitality play a huge role in impression from our trip to Rome. Thanks a lot!
PS: Norka prepares really good breakfasts (try her delicious muffins!).