We absolutely loved the neighbourhood. We chose Eva's place because of the lovely looking roof terrace, and felt very grateful that in doing so we discovered the winding streets which surround it. There is hardly any traffic and the cobbled streets and tiny plazas are filled with the scent of orange blossom. (We were there in March). It is a wonderful mix of near silent streets (like Eva's) and lively corners where people gather and chat outside bars every night. The Spanish don't seem to segregate the generations the way the English do and late into the evening we saw whole families out, with young children playing as their parents socialised. The tapas in the area is also very good.
From Eva's flat you can walk to all the obvious tourist attractions. There are probably public transport options, but walking is pleasant on the many quieter streets and there is always much to see along the way. (The preparations for Semana Santa were particularly interesting when we were there.)
You are very aware that you are in someone's home in Eva's flat, and you feel you are getting a tiny glimpse into someone's life. This is rather nice and far more interesting than staying in an anaemic hotel room. That said, all is clean and tidy and practical. I had the upper bedroom (up some very steep steps!) and slept brilliantly. It was perfectly dark and silent and I found the mattress very comfortable.