Babbo's was a great little find.  We happened on it as we were walking around Rome one evening.  We walked in based on the friendly welcoming look of the restaurant.  We were not disappointed.  The menu is extensive and reasonably priced.   We had the three course meal and were very happy.  I had a wonderful risotto followed by an excellent sea bass dish.  They have a wide assortment of fish and meat.  We were given a complimentary Limoncello after our meal which was a nice touch.  You can eat either inside or outside.  If you want to eat outside you will need a reservation.