Renan is a great host, Correspondence with him was easy and fast.

Flat is small but nice, very central and close to metro. The flat is new and in good state; there isn't a sitting/relax area, so be prepared to spend most time in the 2 bedrooms which are spacious and comfortable.
Flat is first floor on a rather busy small street, so expect some noises to come up.

Overall, good flat for a short stay in Madrid