The place was great, just as advertised. Large, roomy, set over three floors. When you come in the apartment you have a small reception area followed by a kitchen, small dinning area with one bedroom and a toilet. From there you overlook a living room area that is on a mid floor, this has some sofas, a coffee table and two small balconies that have a nice view (unfortunately, at the moment of some construction work going on opposite.) On the lower floor are 3 more bedrooms and a bathroom. All reasonably sized.
The location is probably the highlight, it's basically in the centre of town, right next to the Atarazanas Market. It's easy to walk to most of the city centre from here. Also, it's only a short journey from the airport either by train or a taxi (25min).
As it is in the centre, it can get a bit noisy, but nothing major.
The host was very welcoming and even gave us some tips on where to go.