The apartment is very grandiose, bright and spacious. It's in the attic of a large building, but because of large windowed vertical facade of the building, it does not have the "little cozy" character usually associated with mansards (except for the small room to which we return later). It's in a very quiet neighborhood, and there is a marvelous view both to the park in front of the building and the lavish gardens on the inner side. I also liked that the bright character of the space was further emphasized with the huge mirrors that were manifest all around.
This place is chilling cold. This seemed to be possible to adjust, but I could not figure out how (which might qualify me, but that's another story). I called Marcela asking to show me how to use the system. She went there while I was away and reported: "the heating system is in an operable condition". To which I answered: "I did not doubt it's in an operable condition, I just wanted to learn how to use it." To which there was no answer - but it still was cold. (Maybe a little bit warmer but still much under the comfort level.) Then I discovered the little room (looking to be a children's room), which was a cozy confined place under the roof, and that was finally warm enough - the system that was unsatisfactory to heat the large central space was pretty enough for the little room. So I suggest booking this place only between May and September, or if you are a party of no more than three people who are comfortable with being together in a small place (the little room features one double bed and a single one).
In addition, the water that came out of the shower was coldish-lukewarm (interestingly, with intermittent hot swarms but those were too scarce to save the experience). Probably under normal circumstances I wouldn't have cared much about it, but after a night spent with shivering from cold, a decent hot shower is the last resort and it was too bad to be deprived even from that. My related complaints were acknowledged by the same succinct "the system is operational" remark.
Just some things to be wary of.
The place is barely equipped. The builtin facilities - stove, sink, fridge - are OK but there is just a single mug, for example. Cleaning equipment (broom / dustpan / rag) is missing, so if you happen to tumble off a bowl of milk soaked cereals, you are out of luck. If you want to buy practical things or food by yourself, you won't get it in the neighborhood which is a residential one and lacks general purpose stores. However, there is a 24/7 Tesco not too far, which you can reach in 15-20 minutes.
The overall experience was positive but at the brink of it, what saved it from a catastrophe was the little room.