Great apartment, just as pictures tell: clean, lots of light, space and nice details. Very good for our family of four and best rental-home we have visited!
We used buses and metro (stop Baldo Degli Ubaldi) to move around. It was easy and Edoardo gave good advice to find the stops. Two good supermarkets few blocks away and lots of cafeterias etc.
Good tip for dinner: take a bus to Piazza della Rovere an walk 10 min to Vaticans neighbourhood: many nice restaurants e.g. in Borgo Pio. You'll also get nice look at the Basilica San Pietro in evening lights.
We also recommend Edoardo's help to get airport transportation.