Vin was a nice host; communication with him was pleasant and he reacted very quickly to our messages.
Vin's flat is located extremely central. You can reach all points of interest in only a few minutes by foot.
Everything in the appartment looked like in the photos. Though in the very center of Madrid, the appartment is surprisingly quiet.
We stayed there with 2 persons and had lots of space; but I would not recommend staying there with more than 4 persons.
In summary: Next time I will be in Madrid, I would like to stay at Vin's place again!