I would 100% recommend Maria's place to anyone visiting Rome. Her place is meticulously clean, spacious, and beautifully decorated through-and-through with a modern kitchen and classical-styled master bedroom. If you're travelling with just your partner, you'll also enjoy the benefit of separate bathrooms. :) I really admired the kitchen: Maria provides everything you need, including a fridge of the essentials (and a welcome bottle of white wine) and a pantry with snacks, cupboards with pots & pans, dining ware and cutlery. My boyfriend and I really enjoyed shopping for groceries and then coming home to cook for ourselves.
The location is prime: a couple of steps away from the train station, a couple minutes away from the Vatican. The neighbourhood feels very safe and quiet, and there's a small strip of individual stores on the southside of the building; stop by the little cafe down the road for an espresso in the morning (everyone there is very friendly!).
Finally, Maria is a terrific host. She walked us through her place and explained everything we needed to know in detail. Her binder with instructions on how to use the bus, which bus routes to take, and recommended restaurants was hugely helpful -- I relied on it much during our stay. Maria also accommodated special requests we made, and was very responsive to all of our messages.
Again, 100% recommended. A stay with Maria will exceed your expectations! :)