Marta's guest house was in a perfect location being close to all the major attractions in Rome- the Vatican, the Pantheon, Trevi fountain and Spanish steps all in walking distance. The service from both Cristobal and Ovidio was great and it was no problem for them in answering my questions.
The room was clean and tidy and was perfect for a solo or couple traveller.
I would highly recommend this guest room to anyone considering staying in Rome.