We had a really good time at Marii's apartment. The place is centrally located with most of the attractions within walking distance and the "chiesa nuova" bus stop is just a 4 minute walk away. There is a laundry nearby as well.
Our room was well stocked and clean and the internet worked great. There is a small fridge as well.
Marii was prompt in answering any questions we had and we had a good conversation with her while having some of her homemade treats.
All in all, Marii's place is a great choice for your stay in Rome.