First and foremost, the location was perfect. The only time we had to take a taxi during our five days at the condo, was to the train station with our luggage. Aside from that, we were able to walk anywhere, including the Colosseum, Pantheon, Piazza Navonna, the Vatican and anything in between.
There are so many restaurants and gelato places within 5-7 minutes.
Next, and equally as important; Amazing air conditioning!! We were in Rome during a massive heat wave with average temperatures in the 90s. Our condo stayed incredibly cool and very comfortable. They even have electronic blackout blinds that allowed us to sleep as late as we wanted. The beds were very comfortable too. Plenty of space for all plus two small, but usable balconies that overlook the Tiber River.
Last, but certainly not least, our hosts were incredibly responsive and accommodating. Pierluigi and his Mom were always available to answer questions or assist us.