Diego's apartment is a great place to stay - it has a lovely rooftop terrace and is close to shops and metro stations. My friend and I stayed in separate rooms and both had a really nice experience. Diego wasn't there during our stay so his flatmate Hegoy hosted us who was very nice and easy-going and gave us some very useful transport tips. I had to sleep with earplugs as the street outside is a bit noisy but I am a light sleeper - if you're not that affected by noise it will be totally fine. Overall definitely recommended, especially for the reasonable price.