Mariana's place was perfect: spacious, very clean and close to lots of great cafes and restaurants and the US embassy which is what we were principally there for. There is a guard at the front desk 24/7 so, although we never met Mariana, it was very easy to check in and out.
It would have been nice to have some coffee, or even drinking water, ready for us in the apartment, but since there are restaurants and shops so close it wasn't a big problem. I would definitely recommend it!