It is really tiny and quiet flat with studio and small bedroom on the second "floor". It is very comfortable, nice and very very cozy. Ideal for couple. The apartment has modern and stylish design.
You can sleep on first flour, but it is much more comfortable on the second one. In beginning of June we didn't need to activate conditioner at all. At the kitchen there is everything if you want to cook light breakfest. At breakfast we ate all days only proscuito con mozarella di buffala (Roma must taste!). We purchased it in 2 min away supermarket - Anabella can prompt where it is.
Technically, it is 7 metro stations from Termini train station - looks like it is far away from center. But the real center with most expencive houses and with central shopping street - Via del Corsa - is just 15 minutes on bus.
We recommend to go to Vatican Museum, Sestina Capella and St. Petro over closest Cipro station, not Ottaviano - much fewer crowds of tourists.
From this place it takes 20 minutes of very relaxed walk with, for example, local icecream - Gelati (Roma must taste!). And we recommend visit Vatican museum, Sestina Capella and St. Pietro at first day. One wouldn't have enough power in next days to climbe at the top of St. Pietro (if you want, of course) with wonderfull look at the all of the Rome :)