The location is fantastic! Footsteps from Trevi and easily accessible to shops, restaurants, other tourist spots, etc. Dunia was extremely responsive and gave us great recommendations for restaurants, etc. Even though the location is in an extremely busy area the space is behind the front of the building so there is no noise at all. It's nice and spacious.
Cons:
The stairs up to the apartment are treacherous! Not meant for older folks or folks not good on their feet. Narrow, uneven and steep. Dunia had staff to help us bring up our luggage which saved us and was wonderfully appreciated! The entry is fine but to get to the stairs you weave through several utility type rooms to get there. (Not pretty)
The shower on the ground floor is short. My tall 18 year old couldn't fit it in so she used our shower instead which was fine.
Overall, we appreciated how centrally located it was and Dunia was a great host!