Pros:
1) Location is amazing. Centrally located less than a block off Plaza Navona, this is the definition of "walkable". 20 minutes one direction takes you to St Peter's Basilica or the Musei Vaticani. 20 minutes the other takes you to the Coliseum/Forum. Less than that to the Trevi Fountain, Spanish Steps, Campo di Fiori, etc. etc. etc.
2) Apartment is comfortably furnished, plenty of cookware, etc Clean and tidy as well.
3) Hosts were flexible and responsive, and helpful on check-in
Cons:
Basically only one: this apartment is on the corner of a very busy side-street, with 4 popular restaurants and two busy shops that are all open late directly underneath or next to this place. (The apartment is directly above a wine bar). This results in a lot of noise from the street, late into the night. If you're a night owl -- this isn't a problem. If you're not (like us) -- we put in earplugs and found ourselves sleeping great, just be aware this is not a quiet secluded getaway spot.