We were so fortunate to book Marco's Navonalofts for our recent 5 night stay in Rome. The location of this Airbnb cannot be beat - it is located on a very popular street that's named in every guidebook. We walked everywhere from here - Piazza Navona, Pantheon, Spanish Steps, and Borghese Gallery on one day, Colosseum, Forum, and Palatine Hill on another day, and St. Peter's Basilica and the Vatican museums on a different day. We also walked to Campo di Fiori a few times to get pizza and suppli's.
We saved so much money on our trip by walking to places rather than taking a taxicab, even though there is a very convenient taxi stand a block away, and also by buying some food and snacks from two grocery stores nearby. The flat has a washer and a dryer and full kitchen, and everything worked well. We actually felt like there was more space than we needed for our family of 5, and that's not typically the case for a flat in Europe.
Most of all, Marco was a gracious and generous host. We used the breakfast tickets he provided us at a nearby cafe to enjoy the most delicious croissants and cappuccinos (steamed milk for the kids) for free. Marco also arranged for our ride to the airport and that made it so much easier for us than having to book a cab on our own.
If you want to feel like a local living in Rome, I highly recommend the Navonalofts for your stay.