My mom and I stayed in Fernando's place for 5 nights and it was great. Very central, walking distance to pretty much everything (10 minutes to the museums)
The place itself was small but very tidy, it had everything we could think of and even more.
Fernando was delightful and easy to communicate with, he helped us with what we needed.
Just so you know, it is 4th floor in an old building so the stairs were hard, and the shower is small. we got by, but for a person who has trouble walking or with small places it might a problem.