Nicolas's apartment is immaculate, clean and very well decorated. It is spacious and well located, peaceful and quiet. All in all a 5* experience. The facilities and welcoming touches by the host are exemplary. Bottled water, cola and even a bottle of beer were provided in the fridge as well as coffee and tea and a few small chocolate bites. The cafe at the front of the building is lovely. Location-wise it is close to many landmarks of the centro. San Juan market is a must go.
One thing that is a bit confusing/misleading is the description as a loft apartment which suggests the top of the building but in reality it is on the ground floor which explains other reviewers' comments on the dark interior as there is little natural light. This however is counteracted by imaginative mood lightning. The loft i suspect really refers to the mezzanine floor of the bedroom.
Overall i would highly recommend this stay.