The apartment is located in an old, charming building and has been completely renovated. My wife and I found it cozy and clean, and everything was ready for our arrival. Despite us being an hour late we were still greeted on-time.
The apartment is conveniently centrally located, it can however get a bit noisy at night in this neighborhood (barrio alto). Most bar-goers are partying in the streets till 2AM, or 3 on friday/saturday. If you're looking to go out however, there would be no better-suited location than this apartment.