Recommended, for real!
Nice place, near the centre, or at least near where we wanted to go.
Nelson and his wife are some of the best people you may find. We had problems getting back home because our flight was cancelled, so we asked Nelson if we could rent the house again, but it was already booked, so he and his wife helped us looking for a place to stay and managed to find one.
They hosted us in their shop while we were searching, and saved our day/trip, for nothing, just because we needed help.
If you wanna visit Madrid go definitely for this apartment!