Buyer beware!
First, the good: the location is described accurately. It is in the center of Rome and easily accessible to all the sights. The owner allowed us early - 30 minutes- check in and responded quickly when contacted.
Now the bad: the apartment was unbelievably filthy when we arrived. Not just trash, unmade beds and a sink full of dirty dishes (all of which greeted us upon arrival), but filthy floors, stains on the furniture upholstery, moldy walls and peeling paper in the bathroom. The "kitchen" is very beat up and needs at least a minimum upgrade to be halfway usable. The outside patio area is very dirty and unkempt, and doesn't bear the slightest resemblance to the listing photos. The worst part was the smell. It was indescribable. We spent less than 30 minutes in the apartment and could still smell it on our clothes the next day. We couldn't leave fast enough.
That being said, if you dig DEEP into the reviews, other renters commented on the lack of cleanliness and general "skeeviness" of the apartment. If you are with a group looking for a flop house to hang your hat between excursions, this might be right up your alley, but for us, it was a hard no from the minute we climbed up the narrow winding staircase, had to force open the door to even get in, and then saw-and smelled!-this rental.