The room is really nice, very clean, there's a private bathroom, which is really nice. The welcome snacks were good, nice breakfast selection of teas and coffee was a good addition to my stay there.
The location is superb. Very central, close to the metro and just a few minutes walk to the Colosseo. There's also some really good restaurants around, and the host provides the guests some really good suggestions.
The only downside was that the Wifi didn't work for 3 days during my stay. It wasn't a major issue, and the host offered me a 3G wifi router, which was nice of her.
Apart from that, everything was top notch.