Don't even think once, just go ahead and book with Valeria if you want to enjoy your stay in Rome.
Everything is perfect with Valeria from the start of the booking till you leave her place.
Valeria is extremely helpful and always ready to help. Her house location is excellent, just at at 3 minute walk from the house is the taxi stand and next to it there is Carrefour express supermarket.
All the sights are either at a 10-15 minutes walk or max EUR 10 if you want to cab it out.
There is nothing else to say.
You will definitely have a wonderful stay at her place.