Location! In 5 days I did not take a taxi as it is close to sights and tour meeting points. Building and apartment is really clean and secure and just far enough away from the tourist hub. It is the kind of place you can land, drop your stuff and walk across the road to eat at a decent bar or cafe. Miguel is quick to respond and there was someone waiting outside the building to show me in, help with luggage and explain the apartment, keys, etc.
Highly recommend for solo or a couple.