Martha’s place is fantastic, with 3 balconies for great views and relaxing. It is well located on the Aventine Hill and quieter than places closer to all the tourists. The sofa bed was very comfortable for my 10 night stay and it was pristinely clean, and because of the longer stay, Martha offered a linen change halfway through; a very nice touch which also included another cleaning.
It is within walking distance of many great areas, and there are buses and metro stops close by.
Highly recommend for short or long stay in Rome.