Great centre apartment.
We were the first to rent it, for a week. It was just finished, nearly everything was new.
The photos are very accurate, we were not surprised at all, you get what you see, and it's beautiful.
Yeah it's below the ground level, hence you don't have a terrace with a view, but who cares? You'll be exploring Rome all day, Rome will be your view.
The kitchen and the bathroom are of great quality (huuuge shower space), the bed is comfortable and looks awesome (mind your head in the bedroom area though), the living-room is spacious and includes a sofa and a folding table which can be used as a desk or a dining table.
Pans and cutlery are not cheap, it was a pleasure to use them.
Big fridge, big oven, big cooking plates.
Two wardrobes for your stuff.
The entrance to the building looks amazing, it feels very safe even at night, the courtyard with the plants is georgeous in the summer.
There's a coop supermarket just 2 minutes north. From the street you can see the the colosseo. We were able to do everything by foot (Vatican, Villa Borghese, Via Appia, Trastevere, Testaccio....) but we're good walkers. You'll probably want to use the bus/streetcar from time to time, but even then the location is great.
DO bring mosquito repellent if you come in the summer. Not just for this apartment, but because during the day, mosquitos WILL bite you if you don't. And they're horrible.
But Rome is worth it. So go ahead and book!