Martha's place is very well located, a few minutes from the Coliseum and walking distance from many turistic sites.
The studio has everything you may need to stay in with your family.
A tube station is a few steps from the door.
There is a minimarket around the corner, where you can find almost everything. It is a little bit overpriced but still convenient if you compare it with eating outside.
There are mosquitos so bring your repellent if you are sensible to their bites.
Enjoy the city, it is an open museum.