What a nice appartement and perfect location! The appartement is really huge, with a long corridor and exactly as described. It was all very clean and tidy, the whole appartement feels like new (it has just opened Jan 2013). Gianna Maria is a really nice and polite host and gave us a warm welcome when we arrived there. The kitchen is fully equipped and she even supplied us with some basics like coffee, water and bread. The location is very central and just a short 5 min walk from the Ottaviano/San Pietro metro, or you take the bus, which is running just 1 min from the appartement (but we didn't really get the bus system there in rome ;) ).
We can strongly recommend Mirabello!